BURP
No, it isn’t a impolite body function, it is a distributed computer project using the BOINC framework called BURP.
BURP stands for Big Ugly Rendering Project. Currently the only application that BURP supports is blender, which is fine by me, because that is the only 3D modelling application I use (and all you ever need).
I have a few machines around at home here doing mundane stuff (backup server, file server, web server, etc) and I was originally looking on the net on how to set up a nice local render farm to play around with. While serching for one, I came across a distibuted render farm project on Blender Nation that the blender nation. What a great idea! I can donate some of my spare CPU cycles for other blender users, as well have access to a global render farm.
Here are my current stats (I’ve also added it to my sidebar).

Some of the notable blender renders are viewable in the BURP Hall of Fame. Some of these downloads are quite big though (20Mb+). You may have to use VLC to view some of the videos if you don’t have the right codecs installed on your computer.
BURP isn’t the only project that BOINC supports, there are hundreds, ranging from searching for aliens in space (SETI@home) to cancer research.
Donate some CPU cycles today!