Actually, without offending the developers out there, I still don't think it looks very good.
I think when you fire it up, you should get a (perhaps dark) screen, no itemized listing of transactions, but simply large animated iconic visuals indicating status. The "Send coins" function should be much bigger, and front and center. If you click a tab, you then get an itemized listing of your transactions. There is relatively simple functionality in this application. Make it slick. Make it look like the best iPhone apps out there.
Your balance should not show anywhere on the initial screen. Transactions and balances are only visible when you press the tab. Suppose you wish to open it up with someone behind you to affect a payment to someone (maybe the person standing behind your shoulder)?
This is a desktop application and not an iPhone app, so functionality should come way before fancy visuals and useless eyecandy. Also, I dislike desktop applications that try to sport their own oh-so-cool look and do not adhere to the OS's look-and-feel, they always make a rather toy-ish impression on me.
Extreme example:
http://www.hardwarecanucks.com/wp-content/uploads/SOC-4.jpgQt is cross-platform and provides a native look-and-feel for different OSs, desktop environments and even mobile phones, so I think it is a good idea to use it.
