...I had a rush of blood to the head and bought an actual server...
Sun SunFire X4140 Server
2X AMD QUAD CORE OPTERON 2384 @ 2.7GHZ
2 x 146GB SAS Drives
2 x PSU
It's due to arrive on Wednesday or Thursday and I'm going to try to install Ubuntu Server on it and use it as an email server that crunches BOINC - it's probably not going to be super quick but it can whirr away in a corner all day. I've never used Linux before but the ubuntu tutorials are exceptionally well written...I guess my question is whether you think there's enough RAM there? I'd probably not be able to do the big NFS sieve work units with only 1GB RAM per core, but am I going to hit a wall with only 8GB doing other CPU work units?