Here is a series of questions that should be relevant for many people:
Adjustment of Status Blog Entries
Trying to get an F-1 while an AOS/I-485 is pending has been a recurring theme in our community. Last year in May/June we had spent two hours talking about this theme in our community conference calls. A lot of people wanted to do their MBA and were not able to wait for their green cards to join school.
Generally speaking when you have exhibited immigrant intent, getting an F-1 becomes difficult. On top of that, USCIS has said that F-1 is not compatible with a simultaneous I-485. But USCIS has never told us what happens if do file for an F-1 while an I-485 is pending.