Steven Lehrburger, a software engineer in New York, announced just now that he’d updated his cool web app, wheredoyougo.net. It allows Foursquare users to visualize their checkins with heat maps.

Here’s an example from last January, when I still lived in Austin:

With the new version live, I mapped more than 900 checkins. Here’s where I go in Washington, D.C. (I live at 12th and Kearny in northeast, and I work at 6th and Massachusetts in northwest, so that explains the red spots in the upper righthand corner and downtown).

Below is a national view. This makes sense, as I’ve spent most of my time in D.C. and Austin since I stopped using Gowalla (*tear*) in favor of Foursquare. What’s strange, though, is that I’ve never been to Vancouver.

Thanks for the update, Steven.