This info was posted on AILA website today:
"Service Center Operations (SCOPS) Liaison has confirmed that the service centers are conducting "sweeps" to find adjustment of status cases that can be reviewed for adjudication under the changes in background check procedures announced by USCIS on February 4, 2008. AILA national has asked USCIS HQ for information on processing of adjustment of status cases at local offices that can be reviewed under the same memo, and many chapters have already contacted local USCIS offices for further information on local processing. SCOPS has asked AILA members to hold off on submitting liaison inquiries on cases at the service centers that were delayed due to background checks until after April 30, 2008. The USCIS hopes to have identified and taken action on cases by that date."
AILA Doc. No. 08021366.