Today RIM introduced their BlackBerry PlayBook which is a tablet much like the Ipad, just a tad-bit smaller. In fact it just might beat its predeccesor. It is said to be a powerful 7-inch device. It will have a daul core processor. The ability to play 3D games (OpenGL). The gaming piece is supposed to be another highlight of the feature.
So, how is it different from the Ipad: It runs Adobe Flash Player and Adobe AIR for apps (The software that's used to run TweetDeck on our PCs, etc). Which means unlike the Ipad (& Phone) you will be able to access the full web, not in mobile device format. It will also be able to display content from a paired BlackBerry smartphone.
It will come in two versions 3G and 4G. Scheduled for a 2011 release date. No pricing has been given yet.
Sources: Roc4Life, RIM, Youtube