Thanks Chris and Ron for the responses. I've found BOINC and Condor as very interesting and possible solutions for my problem. Since my software is built around java RMI (using Master/Worker paradigm), they also feel the most natural transitions (The heavy calculations are done in C, if anyone is worried about optimization...) . I'll try to pull this off, and I'll come back to this list with the story of how it went. Arnon