USCIS has just posted another FAQ regarding concurrent filing of I-140 (Petition for Alien Worker) and the I-485 (Adj. of Status).
Although they have already mentioned this on their previous recent FAQs, Q36 from this new FAQ was very specific to Schedule As.
They will accept I-140s and continue processing it as they have always done BUT starting August 1, 2007 and thereafter, filing of the I-485 (AOS) for those under Schedule A will not be accepted anymore and will be rejected. This new FAQ makes it very clear that the extended time (until August 17, 2007) to file AOS is not for schedule As and are for other categories such as applicants already on H1Bs and others but other than Schedule A.
*Reference: http://www.uscis.gov/files/pressrelease/FAQ3.pdf