The initial MySQL Build Farm scripts are now available on the Forge wiki. If you are interested in participating in the Build Farm initiative, feel free to download the scripts and trying them out. Right now, we are still working out how the scripts should interact with the main MySQL internal pushbuild system. But, we need folks to set the scripts up on their host computer and provide input on the scripts and test them.
Interested in participating? Enlist your spare machine on the Forge wiki.