Apple just released iTunes 10.1 Beta and the second Beta of iOS 4.2 (build 8C5101c) to developers. You can download iOS 4.2 on Apple’s developer site with a filesize of 521MB for all devices. On of the new features of iOS 4.2 Beta 2 is the new multitasking animation when switching through the apps, as shown in the movie below.

The firmware is available for the iPhone (3G, 3GS, 4), iPod Touch (2nd, 3rd, 4th gen) and the iPad.