Amazon!I think amazon knows what it takes to challenge the iPad. Their success with the Kindle shows that it can produce a quality hardware product. Also, the fact that they've said very little about their plans suggests that, unlike HP they aren't going to release it until it's ready. And when it's ready, just like with the Kindle, they'll promote it on the front page of their retail site and provided that it's a good product and it gets good reviews it will take off.