January 19 2010 has been reported by iLounge to be the specific date when Apple will announce its much-speculated tablet to the world.
Other newly rumored details of the tablet; it runs the iPhone OS on a 10.7-inch screen with a high enough resolution to read books, newspapers and magazines and there will be two versions, one with 3G connections and one without. The 3G version will be like a giant iPhone 3GS while the non-3G one will be a giant iPod Touch.
The Apple tablet is expected to hit around the May/June period (the months where new iPhones are launched) and though these rumors come from a reliable source, they're still subject to Steve Job's scrutiny before it reaches the manufacturing stage. There is a 20% chance that he might kill it.
iLounge - Ten New Details On The Apple Tablet
Gizmodo - Apple tablet mockup