Didn't have a big chance to look into the software itself but it sounds like a nice idea. Just to let you know if you were going to expect anyone to trust you with any of their Account Details then you're going to have to release the open source software.
Yes, i agree. But i don't think that there is data that should be protected for now. It's not that the app can do a real transaction for you.
PS: wow, that's a huge image.