Attention humans, the Engadget Show will be taping next Thursday, April 21st at 6:00pm! We'll be sitting down with Engadget founder Peter Rojas who will help us wade through the increasingly muddy tablet waters. We'll have on hand the new BlackBerry PlayBook, the Motorola Xoom, the Notion Ink Adam, and a few other slates to boot. We'll unfold the
