TileMill: Open Source Map Design

I've played with this a little bit over the last couple days and am completely blown away by the ease of use. If you're remotely interested in styling your own maps (particularly for a mobile app), you should try this out. It exports to an sqlite-based tile store that you can use to display your map tiles while away from a network connection.

I'm looking forward to the possibility of Google Maps API integration. I'm referring to DS's claim that "TileMill maps are always projected to ‘Web Mercator’. As the name suggests, this projection is popular with web mapping applications, thus maps created with TileMill can be displayed using the Google Maps API, OpenLayers, and a number of other projects."

Development Seed has consistently produced stunning work, both for clients and in terms of their open-source contributions, but TileMill really feels like their crowning achievement. (And all of it in PHP/Drupal, gasp!) Kudos, guys.