This one is sort of a given these days, but appears we now have even stronger evidence that the almost-certainly forthcoming iPad 3 will have a Retina class screen.
Shown here is an iPad bookmark image resource with an @2x version:
We have been finding references to 2X iPad images for well over a year (including iBooks 1.2), (...)
I'm posting about this as a nudge-nudge to my fellow iOS developers to keep this in mind if you are starting out on any new iPad projects, you'll need to whip up a new 2048×1536 resolution Photoshop document.
Should make designing iPad apps a little more interesting.