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Hey thanks for chiming in from Memphis!
 
I want the shortest AOS possible because fiance would not have health insurance until she gets her GC.  No insurance = no pregnancy.
 
But I know what you mean.  Need to consider other factors before moving.  Memphis is awesome.  

Right, but spouse is faster than parent or nephew, which are also family.  But family is the closest wide spectrum category.
 
Might be worth moving if Memphis is twice as fast as ALbany...

In this case, you need to buy a private health insurance through market place. That’s what we did for me, we got it before we sent off the AOS packet. It was really great and comprehensive insurance and they cover pregnancies. I was on that until I found a job and now insured through my employer.
 
Even if she gets a GC, new immigrant aren’t eligible for Medicare and other similar programs until they’ve been LPRs for 5 years 

Thanks! Will do. I'm self employed so I'm on the healthcare.gov Obamacare. I think you have to be GC holder. Need to double check that. 

Search my posts, several of which mention the advisability of procuring these letters.OP, your question is excellent. The responses in this thread so far are uninformed or, at best, rather weak. The name partner of the largest immigration-law firm in Houston -- along with a different immigration attorney who had years of consular service -- stated to me (upon my question) that letters from others are "an excellent idea." I wish to high heaven that I had included some in my K-1 filing, because it could have averted serious trouble at interview time.
The U.S. petitioner can collect several letters (more than a few, less than a lot) from his or her own people: parents, relatives, friends, employers, or anyone with credibility. The writers should state, in their own words, who they are (briefly), how they know you (briefly), verification that your relationship is valid (in detail), and complete contact information for themselves. The writers should have no guidance or bedbug language from you except a reminder of when you and your SO began your relationship, and the correct spelling of your SO's name. The letters should ideally be hard copies with signatures, or at least e-mails (optimally with digital signatures, but this isn't always possible), and not exceed one typed page. They need not be notarized, but don't stop anyone who wants to. If the writer has some credibility (military or ex-military, current or retired corporate executive, etc.), so much the better.
The foreign fiance(e) should have absolutely no more than two or three letters from his or her people. These letters should be in formal language, stating the above information but very factually ("I interacted with this couple [saw them together] on [dates] in [these situations]. Their relationship is genuine."). Nothing flowery. If possible, get a stamp or seal from the equivalent of a notary in the foreign country.
The reason for the restrictions on the number of letters from the foreign side, and on the language therein, is because too many or too "much" can raise a red flag in the mind of the consular officer at interview time -- that there is some ulterior motive behind the enthusiasm of the foreigner's family.
Whether USCIS "needs" such information beyond the primary evidence is completely beside the point. Every K-1 filer needs to keep it foremost in mind that the consular stage -- the interview -- is the primary hurdle to be faced. Consulates can refuse to accept evidence brought to an interview, and then accuse you of not having sufficient evidence. Conversely, if the information is in the package that the consulate receives from USCIS, the consulate cannot deny its existence.
If stumbles occur at the consular stage, it can -- at BEST -- take months and considerable financial/emotional expense to overcome... or, your dreams of being together in the U.S. could be over permanently. Please consider this before accepting dismissive responses from other posters.

Nope! You do NOT need to fill out that number on the I-129 form. I am naturalized US citizen too and never filled that out, just left it blank. My fiancee K1 was approved with no problem. You do need to submit copy of your naturalization certificate though, as evidence of citizenship so you do need that for sure. Someone can scan it for you and email you, if you cannot access certificate due to far away, so one way or another you do need a copy of the naturalization certificate, but you do not need to fill out the Alien registration number on the I-129f form.

I figure this question out myself (I'm filing a I-130 petition for my spouse).
Most of us naturalized citizens don't have our Naturalization Certificate anymore because we had to turn in the Certificate to obtain a US passport and they don't give it back to you.
There's a way to get a replacement of the Naturalization Certificate, but it costs $380!!!
The I-130 application asks for my Naturalization Certificate number.
I called USCIS and they told me that I don't need the Naturalization Certificate number. Instead, I can simply write "N/A" (meaning, not applicable) on all the spaces in the petition that ask for this while including a photocopy of the first page of my passport in my application package; thus, proving my citizenship.
The representative told me that doing this will in no way delay or jeopardize my application.

The bold sentence above is not correct. The "requirements" are spelled out in the I-864 instructions. NVC does NOT make the decision on the I-864 income or assets being adequate. That decision is made at the Consulate. If the income is clearly too low and no mention is made of assets, NVC will require an affidavit from a qualified joint sponsor.
What NVC generally does when somebody attempts to qualify based on assets is to send them a letter indicating their income is not sufficient and that the Consulate MAY require a joint sponsor before approving the visa. I've seen them do this when the "asset" was a $100,000 boat supplementing a military disability payment and for an 80 year old petitioner showing over $600,000 in mutual funds and a mortgage free condo. Both passed muster with the Consulate but got the same exact letter from NVC.
Whether you'll be successful using a 401k to qualify depends a lot on how much more than the 3X the income is actually in there AND your age.
More specifically with regard to the "income" portion of the bolded statement above, there is no question about 2012 or "current year" income. The question is about "current income". It's not the same thing. You could have made 60k already this year and lost your job yesterday. That would make your "current income" zero. Or, you could have just started a new job for 60k on the first of May after two years of no income and your "current income" would be $60k, even if your 2012 income would only be $35k.
When you "don't really know", it's best to wait for others who DO KNOW to come along with the right answers.