My odds (though, given the weekend, I'd give it until Tue AM):
0% May 11 - refuse to file
30% May 11 - no FDA comment
60% May 11 - FDA Priority Review, but not schedule yet
5% April 27- Priority review and PDUFA schedule
5% April 27- Standard review and PDUFA schedule
Remmember, the AIDS conference runs through Friday, and they liked the SHIV study enough to include it in their "breaking news" section.