Thank you Adobe Consulting!
This is a fantastic productivity tool to help get your design work in Flex 2 (beta) jump started. You can use it to spend an hour or two and have a complete style sheet for you app done!
The consulting group asks that if you find anything strange with the app that you let them know. I've been through it a bit now, and it seems ready to go to me. The only thing I haven't found is an entry for the buttonBar, but it might be in there somewhere and I just haven't run across it yet.
Adobe Consulting: Flex 2 Style Explorer (beta) available