Just for fun, I decided to go check out Walmart.com's prices on point-and-shoot digital cameras. The results are pretty interesting:

(camera / walmart.com / bhphotovideo.com)
Canon SD450 / $329.54 / $299
Nikon Coolpix P2 / $399 / $329

So, when they've got the same exact camera, B&H seems to be creaming Wal-Mart. On the cheap end, Wal-Mart offers a 4MP Kodak Easyshare CD40 for $98.84. B&H doesn't offer that camera (it's probably made exclusively for Wal-Mart). The absolute cheapest digital camera offered by B&H is a 3MP Kodak Easyshare C300 for $109.95.

What's this mean? Wal-Mart is a great place if you're looking for the absolutely cheapest version of whatever it is that you're looking for. If you're looking for a more expensive, higher-quality part, it's entirely unclear why you'd bother looking at Wal-Mart.