Blackberry maker Research In Motion just announced its iPad rival at its developers conference in San Francisco. Here are the big bullet points from our live coverage so far. More in the press release. It's called the BlackBerry PlayBook. It's a 7-inch tablet with a 1GHz dual-core processor and 1 GB of RAM. It will ship in "early 2011" in the U.S., with rollouts in other markets beginning in Q2 2011. It runs a super-smooth operating kernel called QNX; the OS is officially called BlackBerry Tablet OS. It runs Adobe Flash (unlike Apple's iPad) and Adobe AIR for apps (the software you use to run TweetDeck on your PC, etc.). It supports OpenGL for 3D gaming. RIM intends to ship both 3G and 4G models.