The dual Clovertowns and the rest of the system were able to EASILY handle doing a threesome operating system install. The below screenshot (click for larger version) is installing Windows Server 2003, Windows XP Home, and Fedora 7 Test 2 (x86_64) all simultaneously without any choking or other problems.
http://www.michaellarabel.com/index.php?k=blog&i=76