I logged into the second machine and quickly did a top. I discovered some fuckwit sucking up 100% of the cpu and memory:
CPU TTY PID USERNAME PRI NI SIZE RES STATE TIME %WCPU PU COMMAND
1 ? 15126 ewm 241 24 130M 28232K run 8:51 100.12 99.95 ecm
The fact that the program is called "ecmloop" definitely raised some red flags. It's just a shell script that executes some home-grown binary ('ecm') in a big-ass loop. I couldn't tell for sure what it was doing though. Why do people do shit like this?
In any case, I've reported this fuckwit to the folks at Compaq. I hope they boot him off all the machines for good.
UPDATE: I forgot to look at the NICE values above. It turned out to be someone else who was running a fork bomb. I'm glad I reported it though, as they booted the guy doing the fork bomb.