It is Used in Folding@Home project.
The Mithral Client Server Software Development Kit allows developers to quickly and easily write large scale client-server applications including “distributed computing” and “GRID” types. Examples of what this will allow you to build with this technology are distributed.net, SETI@Home, Napster, Gnutella, and hundreds of other applications. The example code is an instance of an application that hands out work for the clients to do, then collects the results.