Just read PCWorld’s review of Facebook Connect–a service that not only lets you log in to many sites with your Facebook ID (a la Open ID), but also pings back your participation (if you allow it to) to your Facebook profile.

Oddly enough, the last section of my new book I wrote yesterday was on the idea of growing your influence by syndication (something I see and use constantly on social networks)–and here’s Facebook implementing that very thing.

Already, thousands of Twitter users (including me) feed their Tweets into their Facebook profiles. And I can tell you I get a lot of comments from Facebook Friends about my Tweets.

For a great article on the power of syndication across multiple sites, visit this post by Alex Mandossian.