TechCrunch is reporting that Facebook has announced today at their media event the launch of "Facebook Places," a new service similar to Foursqare that allows users to "check-in" as well as add geo-tags to photos.

The launch of Facebook Places begins tonight with their iPhone app and the "Facebook Touch" website. Mark Zuckerberg, creator of Facebook, says the new service has three purposes:  "[To] help you share where you are. Help you see who’s around you. And see what’s going on nearby."

The service will allow you to tag people in photos and status updates at the location they took place, and allows you to "check-in" to Facebook to see which of your friends are around you. Once you friend tags you in, click "Allow" on the Facebook mobile website and it checks you in. You can't tag or check-in others who are not your friends.

Facebook will also be releasing the read-only API tomorrow, and the Write and Search API's closed beta.

Finally, Android users will be waiting for a while for their Facebook Places update, as the company is claiming, "for Android users touch.facebook.com is good enough" (ouch!).

Anyone smell any privacy lawsuit coming to Facebook's way?