So we have been using googlewave in a Q&A application with our youth. Check out this video! In what ways are you using googlewave? Feel free to comment!

GoogleWave Q&A Application from Chris Fenner on Vimeo.

Our setup:
Cell phone number where students can text questions (could use a online service but we just use a blackberry)
One computer, located at the front, for the speaker to view the questions
Computer to input questions (this computer pulls double duty as ProPresenter computer)
Multiple Volunteers researching biblical answers to the questions, all on the same wave.

Hope this helps! Next project will be using CamTwist to display live polling results inside ProPresenter. Stay tuned for that!