To those of you who were getting Rails errors trying to test out http://RunDumper.com, I have pushed a new rev of the code that should address that. Also, the maps take a little time to download, so if it isn't giving you access to your public map data, come back in half an hour and you should see complete data.

http://RunDumper.com lets you download your public http://RunKeeper.com data in a variety of formats including Excel and Google Earth. It's free - enjoy!