Many of you have heard by now that Twitter this week integrated the ability to annotate tweets with specific place information. This is an extension of the location awareness first integrated in its API and then more recently to

But instead of  Tweeting from “San Francisco”, I now get the ability to specify that I’m tweeting from my office. Clicking on a place will also bring up all the recent Tweets from that place, and it’s working with Tom Tom and Localeze for the listings data.

This brings Twitter’s model closer to Foursquare in that a tweet from a place can be an implicit “check-in”.  Of course it’s meant to be a lot more than that, as 140 characters represent more of a status update than a binary check -in