QUOTE(YuAndDan @ Feb 1 2008, 04:23 PM)

It can varry by POE, I would wait a month or so for green-card in the mail, and if it fails to show up by then, then schedule an info pass and ask about it.
Same goes for SSN, wait to days, and then apply for a card from SSA if it fails to arrive.
Our SSN based on the DS-230 has the date of 01/30/2007 printed on the bottom (we arrived 01/26/2007). According to the SSA, that is precisely when the electronic data from the visa should be processed by SSA---2 business days after admission.
My advice, if you want to possibly have an SSN very quickly, is to apply for the card on the DS-230, but also go into the SSA office as soon as you normally would. By the time you admission is entered into SAVE, SSA should have a SSN card either pending or already issued, or it is not going to come at all. The only way to check the status of SSN is go into the office with the SS-5 application marked "Don't Know", and if they find no record, they will process the application, and if the DS-230's Enumeration-at-Entry (EAE) SSN application subsequently arrives, it will not be processed.
On the other hand, if it matters to you, you may not want to use the DS-230 to apply for the SSN if you don't want to get an SSN which could be used to identify you as an immigrant forever---this is because the first three (3) digits of SSN's issued through the EAE process aways begin with 729-733 rather than the usual state codes determined by the ZIP Code of the mailing address for the original card. The SSN area codes are public information available from SSA here:
http://www.socialsecurity.gov/employer/stateweb.htm. It is unclear why SSA has chosen to use a special area code for EAE applications, but continues to use the ZIP code of the mailing address for Enumeration-at-Birth (EAB) SSN's which are processed similarly in all other respects except with state birth certificate data from vital registration offices (state code for EAB's is not based on the state of birth either).