This is the last “drop tables and reinstall” release. From now on, you will be able to upgrade your database smoothly from version to version.
The major difference between the last alpha and first beta is the UI interface overhaul discussed here: http://groups.google.com/group/thinkupapp/browse_thread/thread/9f12e013ee2c4751
Otherwise, compared to the 0.008 alpha, beta 0.1 includes a very long laundry list of bugfixes and updates. You can see the complete changelog here: http://github.com/ginatrapani/thinkup/compare/v0.008...v0.1