QUOTE(slim @ Jul 11 2007, 12:41 PM)

Also, once married, the K-1 is technically "void" and the alien is out of status. (I'm surprised you didn't jump on this one, Satellite!)
I have seen this said on VJ many times, but what Russ and fwaguy are saying, I think they are correct, in that the I-94 becomes your document in terms of legal stay in the US upon entry and the visa is pretty much useless, but it does come into play for other minor issues like attempting to change status pursuant to an I-539 will be barred because you used a K visa to enter rather than some other allowable type.
QUOTE(slim @ Jul 11 2007, 12:41 PM)

They are, however, allowed to stay by decree of the Attorney General because they're married to a U.S. citizen. (Still right, so far?)
Yes, but only after filing for AOS, and not by the simple fact of marrying.
QUOTE(slim @ Jul 11 2007, 12:41 PM)

They kind of fall into a "limbo" status at this time because the K-1 is set up specifically for the purpose of coming to the U.S. as a non-immigrant that becomes an immigrant within 90 days.
I think the real limbo occurs for any dates after the expiration of the I-94 until receipt of the NOA1 for AOS.
QUOTE(fwaguy @ Jul 11 2007, 12:48 PM)

Actually the K-1 is "technically" void upon the expiration date or use (ie..entry into USA), whichever occurs first. Upon entry, the I-94 becomes the controlling document and any dates on the K-1 are "moot".
I tend to agree with this as stated above.
QUOTE(russ @ Jul 11 2007, 01:16 PM)

Sat can correct me, but US Visas have exactly zero to do with the duration of legal stay in the US. Once inspected at the border, the duration of stay is determined by the date affixed to the I-94.
Agree as stated above.
QUOTE(russ @ Jul 11 2007, 01:16 PM)

It is probably possible to end up being deported if you do not file an I-485, though assuming the marriage is otherwise valid, this is highly unlikely.
Of course, but to get into ICE custody you pretty much need to commit a crime. And then depending on the crime even the I-485 filing won't help you stay off deportation.
QUOTE(russ @ Jul 11 2007, 01:16 PM)

Even if you do somehow end up in INS detention for a deportation hearing, I'm relatively certain a competent immigration lawyer would file the AOS before showing up in court and be able to seek relief somehow. (Sat - any knowledge about how this would happen?)
Typically people end up in custody for a crime or outstanding warrant (even for silly things like not showing up to court to pay a traffic ticket) or for green card holders when they travel and their felony conviction finally comes under the radar at the airport. Otherwise it is really hard to get picked up. Those employment raids are too far apart and we don't do random document checks like in Russia!
But once in custody, depending on the court docket, you are almost better off filing your I-485 with them, because the judge has jurisdiction over most matters once you are in court. And the adjudication is done right there and then in an hour or so at your individual hearing. But most likely your attorney and with permission of the government, the judge will move to close proceedings to let you continue the process with USCIS. There is really no advantage to filing your I-485 before you have your first master hearing, because there is no guarantee the government will agree to close proceedings to let you continue down that path (thus you wasted filing fees).
The other bad part of getting picked up by ICE, is that you must have a bond hearing to be released from custody in most situations and that will cost you at least the minimum at $1500 and only after that can you move to close proceedings. Or if you don't have the $1500 (you can ask to be released on your cognizance, very rare) or you can sit in custody and wait for your individual hearing (which could be a year later) and get your I-485 adjustment adjudicated that way!
As usual - PERSONAL OPINION not legal advice.