Wal*Mart and Sprint working together is a formula for disaster. Back a few years ago, when the local WalMart dealt with Sprint, it was a nightmare. For the last couple months, every single Sprint plan that was sold was screwed-up in one way or another. The surprising part was it was Sprint that was screwing things up, not the Walmart workers. Things got so bad that the local WalMart stopped selling the phones (they didn't work that good in our area anyway), and it still took like a month or two for Sprint to get a Rep to come and collect their merchandise.
I'm not exactly a big fan of Wal*Mart, but I wouldn't be caught dead with a Sprint phone... but as I look at it, is there any cell phone company that doesn't try to screw the customer?