MediaDevil makes a couple of screen protectors for the iPad 2 and the third-generation iPad. The Magicscreen is a standard "film" screen protector and is harder to install without trapping some bubbles. Easyscreen, on the other hand, is a truly bubble-free screen protector. The only problem is that it will slightly reduce the clarity of the iPad 3's Retina display.
The Easyscreen is very similar to the GreatShield EZ Seal Plus and Moshi's iVisor (see next slide) in that only the outer frame adheres to your iPad and the middle of the protector doesn't actually stick to the screen, which is why you don't get any bubbles. You just have to align the protector on the top of your iPad and lay it down, and that's it.
One thing the MediaDevil Easyscreen has going for it over the Moshi iVisor is that it comes in a multitude of colors so you can essentially change the color of your iPad (or at least the front border) to just about any color you want.
Note: This screen protector will slightly reduce the clarity of the iPad 3's display.