Siggraph 2000
Top Left
Eric Knisely
Top Right
The whole Caligari Siggraph 200 team
Bottom Left
At the TS User's Group Meeting, that's Mike Harris and Roman Ormandy on the left and Brett Fattori on the right (and some of the other caligarians around the table.
Bottom Right
If you turn your head sideways you can see Alan McIntyre and Kevin Barnett (Opiejuan).