This is daan Strebe, original author of Geocart. After years and years of development, and years of delays, we are now in prerelease and very much looking forward to feedback from our beta testers. Let us know what works for you in Geocart, what doesn't, what you like about, what you don't, tips and tricks you've discovered, your ruminations... but not the color of your spandex shorts, please.
Hopefully we'll have Shapefile import in the next prerelease, and you can go to town on that. I'm mired in WKT parsing at the moment, and I'm going to get back to that now. Enjoy!
— daan