Motorola just announced MOTOBLUR, an Android based UI that places a large emphasis on social networking. From what we know so far, MOTOBLUR is:
A set of social networking widgetsDeep integration of social networking services into the Android OSOnline backup, restore, and remote wipeIntegrated contacts and email ala Synergy
The service looks to be very compelling. You have Twitter, Facebook, and MySpace statuses all updateable at once and also populated everywhere on the device. Getting a call? See their latest...