The Xoom ads I've seen are fairly baffling, full of robots and weird spaceship thingies. In contrast, the iPad ads almost seem like anti-marketing. Look, here's what the product looks like! Look, here's what the apps do! Of course they're actually very cunningly designed (it's difficult to get simple things done that well) but they at least let you visualize what the iPad is and what it's for, which is more than I can say for the Xoom.