Virginia Tech officially announced that they will be migrating their G5 Supercomputer from PowerMac G5s to Xserves.
According to the article, the Xserve G5s will reduce power consumption, heat production and decrease the system size by a factor of three. The pricing of the upgrade is still being determined, and according to Srinidhi Varadarajan, they are working on getting "very good homes" for the PowerMac G5s which will be replaced.
A Page 2 MacRumors report first mentioned the Xserve upgrade, with subsequent confirmation from ThinkSecret.