Webout also has support for Instapaper's mobilizer and will also soon have support for AirPrint.
"Stream HTML5 video to Apple TV with AirPlay. Safari will only stream audio via AirPlay, but webout can stream video as well in this update. For most videos, just tap play on the video within the page, then activate the stream via the action menu. It's a little spotty on the iPhone since a lot of websites deliver video to your device not inline for the smaller display, but it works great on the iPad. Requires 4.2, a device that supports multitasking and the latest OS version on your Apple TV."Webout is available for $1 on the App Store