All I know, is that all 4 of my inside sources that actually work at Apple, there is no project for a tablet.
They can't think of a way to get away from having 10" of exposed glass ready to be shattered on the first drop.
And they won't do swing arms because Apple's philosophy is to keep it simple with the least amount of moving parts. Think about it.. Imac (all in one), Macbook & Pro (one hinge clamshell design), Ipods have mostly moved into flash media.
I just don't see a tablet coming out from Apple and all these rumors seem more like consumers trying to push the company on what they expect rather than what the company is actually doing.