Feedback:

1. Make this as a webapp. Should work anywhere, like gDocs! Think: Anyone can collaborate, so the ideas and possibilities are more.

BTW, Why did you go the platform way? any particular reason worth mentioning?

2. Have a forum for knowledgebase, to answer FAQ's, ideas and take new-questions. See OSQA or Askbot, might help you a lot in this direction.

3. Show your users, all the cool possibilities. Videos and use-cases matters most to convince anyone to try your app.

4. Get more templates, widgets(short-codes) and page-layouts. This will be cool to start-off!