Hmmm, while running Seti and using my computer at the same time seems to yield the following results...
-Aim running seems to take 1-2% of my processor
-Outlook Express is a pig....But I wouldn't expect anything more out of them than winstar.net is for bandwidth
-MSIE running, no problem, just don't click on anything
-Appletalk is bad
-Airport card active in a G4 is bad
-Seti window shaded and to front or black screen doesn't appear to matter
-Ram disk active but with a 30gig, 7200rpm HD doesn't even make the slightest dent even with 360mb's of ram built in with virtual memory off...
-The difference between XLR8 and Powerlogix isn't discernable but missed when one or the other isn't running.
-Saving WU's is good, when Seti has it's 'down times'
-Locking the box up in a freezer doesn't produce any noticable gains other than an instant access beer locker and slightly higher electric bills- but your friends think it's kewl..
-Playing MP3's while attempting to crush a WU is a bad idea even if Seti is to front...
-Playing DVD's in a DVDram drive while trying to crusha WU? Seti looses that battle...
Oh yeah, Seti 2.04, OS 9.0.4 AGP 450mhz G4

single processor