We're working on a sizable Android app over at <a href="http://vodpod.com" rel="nofollow">http://vodpod.com</a>. We're hoping to test it it in the next few weeks.<p>My impression, after two months, is that the architecture is solid. A good deal of thought has been given to privacy, information sharing, and interoperability. It's a very open platform, and I think that's a big strength. On the other hand, it's Java, and there is a lot of infrastructure required to accomplish simple tasks, such as moving to a new part of the app or displaying a notification. Perhaps that's my Ruby bias, though. :)