Adobe has released betas of both Flash 11 and Air 3 for Mac OS X, Windows, and Linux. The new features that caught my eye right away include full 64-bit support for Flash Player running in browsers (even in Linux!) and support for delivery of full HD video with 7.1 surround sound to AIR-powered TVs.
I haven't tested these betas out; I use Click2Flash to block 99 percent of the Flash content I come across these days and force it to play in a more CPU- and battery-friendly format instead. For the curious among you, you can head to Adobe's site and download the new betas. Some of th