Vista Ultimate x64
Boinc 6.4.5
A few things in the background, Coretemp, RealTemp, Pidgin, Daemon Tools, foobar2000, and Opera. The other 24/7 stuff.
i7 920 at 3.8 Ghz w/Turbomode (QPI=190)
3x2GB DDR3 1520
3788 Whetstone
9474 Dhrystone