I bought myself another quad core machine about 3 weeks ago. I finally got it out of the box this weekend. I spent a few hours getting it ready, getting the crap off it that vendors supply, updating windows, etc. It has been crunching some Seti work to start with, but now has joined my usual 3 projects.
I will post some pics when I have reorganized the farm as its just sitting in the middle of the floor at the moment. The "farm" now consists of 5 quad core machines.
I need to get myself another KVM switch then it can share a screen and keyboard. I also need a longer network cable (which is why its sitting in the middle of the floor). And just to tidy things up I will probably get another shelving kit.