WalMart just started selling the iPhone today. Here is the model line-up. You can't buy online from WalMart.
Here's a 49 second video I shot at the WalMart on Austin Hwy in San Antonio.
The Point of Purchase Display is the front end-cap, surrounded by other, lower end phones. The salesman I spoke to told me that the plan is to attract customers who don't normally shop at BestBuy, an AT&T store or an Apple store. (intro music info here. I was listening to Richard Turner's "Best of the Beatles Radio Show" on KSYM)