The cool thing is that they took surplus military CPUs. Instead of guiding missiles aimed at us, they'll be looking for aliens.
I don't see why this couldn't be adapted to RC5 as well. If they have a mini version of linux running on the card, getting RC5 to work souldn't be too much more work.
It's about $500 for 9 units / 24 hours. Russ is going with $25 MB's ($150 for 6 of them), say $25 for used ATX PS (another $150), 6 used C400 CPU's (maybe $50 each or $300), 6 nics ($10 each or $60), 32 meg of PC100 is running 30ish (another $180), and 6 used floppies ($5 each or $30). That's $870, and that assumes that you don't need keyboards or videocards.
All-in-all, this is a very cost effective way to increase WU production. Of course, the whole idea of SETI is to use the extra processing power that you already have ....
Michael