I know that there are a lot of posts on this site about Screebl. Just wanted to point out a new review of the app on www.approasters.com. I think it's their premier review (they call it a "roast", which I like a lot).
Anyway, it's the most complete and thorough review that I've seen to date, and very well balanced. I've gotten some great ideas from their roast of Screebl. If you're looking for additional information on the app, this review might be a good place to start.