Conmergence Labs supports volunteer distributed computing (cloud, grid, HPC; BOINC, Grid Republic, Progress Thru Processors, World Community Grid, etc). Feel encouraged to ask how your firm can contribute unused CPU cycles.
World Community Grid
Code for America Brigade
Not yet active but hope to be soon. Please see http://codeforamerica.org/brigade/
Great Global Grid
Boosting: Global Lambda Integrated Facility (GLIF), GLOSAS/USA, Google Fiber, the Gig City, Internet2, MozillaIgnite, National LambdaRail, National Regional Educational Networks, US Ignite, etc. Fiber, Wi, what have you…