What's amazing about OpenSocial is how it accelerates the pace of interconnection, previously rampant mostly within single, rapidly growing social networking communities. OpenSocial ties these fast growing communities together for a quantum leap in value and connection (to people, groups, organizations, philanthropic causes, etc.) Blogging, tagging, media (video and picture) sharing, and online personal or professional communities have become interconnected. Browser technology, such as from Flock, add to the usefulness of these ever-more useful tools.

2022 Update

Update: Most know that the Dodgeball founders left Google and the company morphed into Foursquare and then Swarm. 

2007 Blog Post

Dodgeball.com is in the Mobile Social Software (MoSoSo) space. This seems useful and easy to use. It is within Google's stable of applications, so it recognized my Google account and asked permission to use that account and log me right in.