UI usability feedback
Played around with UI and it looks good. Some little nitty-gritty feedback:
It's a bit confusing why "Rate" -button is visible in the Market preview components when you are not logged in. There is the link to get in to market anyway.
I would be happy to help with fixes and testing in UI if you accept outside contribution.
Some button clicks that takes a while (e.g. log in) could indicate that the button is pressed and something is actually happening. Progress bars etc..