How about running trail version of 3ds max 9 on 3 separate computers so they can all render at once to get a bunch of stuff done for finals.
X2 7750 @ 3.0ghz
X4 9850 @ 3.0ghz
X4 940 @ 3.5ghz
Otherwise I do the usual; msn, aim, xfire, itunes, firefox/IE8, vlc media player, burn files to a dvd, transfer files across my network, adobe dream weaver, adobe fireworks, adobe photoshop, autodesk 3ds max, autodesk combustion, torque game engine, unreal tournament 2004, unreal engine(custom levels), etc
Although I haven't ran every program there at once, I do run a large combination of them on a regular basis, the adobe products will all be open with most everthing listed before them when I'm working on a website. Than 3ds max, photoshop, and a game engine are typically running at once(usually play testing the game at the same time). I also have combustion, 3ds max, and dreamweaver open together when working on my demo reel and uploading it.
Most of that work is done on my Phenom 9850 as I converted that build into my workstation, the Athlon X2 is my HTPC/back up gaming rig, and the Phenom II 940 is my main gaming rig.