Mahalo has begun  allowing users to associate their profiles with their user profiles at MySpace, StumbleUpon, Digg, Twitter, Flicker, Facebook, LinkedIn, and Pownce.
This is pretty cool for people who would like to start getting their various social media efforts coordinated, and who wish to promote their work across multiple sites.
I previously mentioned Spock , a service that does something similar, only Spock is coordinating results and information without asking permission to create combined user profiles on people – something that some have found a bit creepy. Mahalo’s opt-in format is in contrast the noncreepy way to go about doing this sort of thing.
This looks like a useful self-promotion tool to me, and another service to keep in mind when doing social media optimization (“SMO”).