Now that I am on a number of social networking sites, I find that syncing up my friends/contacts to be a chore.  I am able to sync up my phone with my computer address book and with one on-line service, but sharing contact info with other services is one way and requires that I export my list from one service as a csv file and import it into another.

Well along comes the Portable Contacts API.  David Recordon has an article about efforts to integrate this api with various services.  Facebook is not among them unfortunately.

Of course when it becomes stable, I'll have to put it in kularing.