Version 2 of the Remote.app just hit the App Store with some new features. The new Remote.app also gets updated to Retina on the iPhone 4 and better takes advantage of the real estate of the iPad. The shared libraries feature should also make playing video much easier (rather than having to open the video and click the AirPlay button). If you look at the new iPad version, the interface is almost like the iTunes desktop interface!
And don't forget that new icon!
Download: iTunes App Store