Things that are confirmed:
Unveiling of Leopard (Illuminous? Please?)
Details on iPhone
Things that are rumored:
Parallel's demoing their server virtualization software
Brushed aluminium iMacs (Might happen at an announcement after WWDC, like when Leopard actually comes out)
iTunes movie rental service
iTunes bumps resolution of videos
Things not happening:
iLife and iWork updates (they wouldn't be very WWDC-y announcements)
New iPods (although I wouldn't count out an allusion to future iPods getting iPhone features)
APPLETON. SInce Apple fucked up MacWorld, the Superbowl of Apple fanaticism, they had best not fuck this up. This is like the, I dunno, Robot Wars of Apple fanaticism.