Hey now, what's this? Looks like Walmart has made some space on its crowded shelves for the HP TouchPad. An eagle-eyed tipster sent in a shot from his local Wally World of a tag and some room just waiting to be filled up with the planet's first webOS slate. It's always possible that someone's just throwing out their latest Photoshop masterpiece, but the $599 mark certainly has an air of legitimacy (and matches what we saw, back in May). So why not swing by for a better look? And maybe pick up a few dozen iPhones while you're at it.