This plugin works with rails3. More information is available here

Live Demo

http://demo.neeraj.name/admin_data

Documentation

http://neerajdotname.github.com/admin_data

JavaScript Unit tests live result

http://demo.neeraj.name/admin_data/jstest

Source code

http://github.com/neerajdotname/admin_data

License

Dual licensed under the MIT and GPL version 2 licenses.