• The latest version has a 10.7-inch screen.
• It runs iPhone OS, not Mac OS X.
• One version will come with 3G Internet access, like the iPhone. One version won't, like the iPod touch.

http://www.businessinsider.com/apples-tablet-is-a-big-iphone-2009-9

Interestingly, they say that the original tablet had a 7-inch screen, but it was deemed too small, and the latest version is 10.7 inches. (Which differs slightly from the "consistent" 9.7 inches coming out of the Asian trade magazines for the last few months.)

But they also say there's still a 20 percent chance that Steve Jobs will kill it. Again.

http://gizmodo.com/5370084/the-most-detailed-apple-tablet-rumors-yet-coming-january-19