Well we're not going up as fast as we used to (that's why we need more of you to join!) but we're ranked at #447 for SETI@home & going strong.
I just upgraded from a Celeron 2.8 GHz to a P4 HT 3.0 GHz. That is increasing my output greatly. Then I'll be replacing my media PC (the dual 550 MHz PC) with the leftover Celeron once I get a new low-end board for it - the current setup doesn't record the best quality due to lack of speed. And I'm hoping to replace the server with a faster unit (from 650 MHz to maybe 1 GHz?).
Should add up to higher output.