BOINC! I've been running one with Predictor@Home and SETI@Home for the past couple weeks and even at 2.17GHz and a lowly 135MHz FSB it is just kicking the crap out of my AXPs, DXs, and even my old A64. If you're into BOINC at all then I'd recommend these wholeheartidly(is that even a word ).

I'm tempted to pick up one of the setups that have been for sale recently here at XS because I couldn't even imagine what 2.6 or 2.7GHz at over 200MHz FSB would do!