Preview Reviews of RIM BlackBerry Playbook Appearing: Half-baked like Motorola Xoom?

Research in Motion (RIM) ruled the mobile device world for years until the iPhone and, later, Android challenged it for mindshare and marketshare. Today, RIM is attempting to break into the tablet world that Apple’s iPad currently rules. RIM’s BlackBerry PlayBook is only available as a pre-order item to most of the world. However, a number of tech reviewers have been given review units and released their thoughts this week. These preview reviews are, for the most part, lukewarm.