Hello i would like to suggest to get more mobile companies into the donation system, everyone is paying by mobile now!
I live in Lebanon (middle east) and i have alot of friends that play with me on icecrown, many more from other middle eastern countries.
Our main mobile company is called MTC touch, and trust me its easier then it seems to partner with it, they just like the money.
Anyways i hope you take my suggestion in action!