They’ve been an undeniable success. Quoting from the front page: “As of April 2007, Grid.org manages 3,732,696 global devices, with 1,340,913 registered members contributing 210 years of CPU time daily”
Unfortunately, this forum post speaks of an upcoming announcement that Grid.org is ending:
With seven years and five projects under its belt, Grid.org has successfully completed its mission: To evangelize the benefits (and demonstrate the viability and security) of large-scale Internet-based grid computing. Therefore, it is with great pride for all the accomplishments of this pioneering resource, and above all with the utmost gratitude to each of our members around the globe, that we announce Grid.org will be retiring on Friday, April 27, 2007.
Read the rest for more explanation and alternative places to donate.