Come join the collective! Bots for new platforms or adding bots for for existing platforms will increase the build capabilities available, and are therefore much appreciated.
What you need is a reasonably fast machine, with decent RAM and disk, and of course a stable internet connection. It might be easier to first set up the openoffice build environment on this machine.
Please see http://code.google.com/p/ootermite/wiki/AddNewBuildBot for more information.