Something is telling me the the BlackBerry Curve 8520, expected to be available this Wednesday, Aug 5th, will sell pretty well.  Now, I will qualify this by saying the it will sell pretty well by T-Mobile standards, however, with a sub $50 price tag at Wal-Mart, this device should do well with tweens that want to get a cool phone, but, their parent’s won’t shell out the cash for an iPhone.