A clever little hack to display Plex content on an Apple TV with no jailbreak required:

Essentially, you run a program on your computer which masquerades as the Trailer app. Next, change one setting on the ATV, and you’re up and running. It took me less than 2 minutes to install and get it running. It already uses the new transcoder (which means great support for subtitles), and I suspect it’ll support myPlex soon as well.

There’s a bit of manual configuration to do with this first version of PlexConnect. You can find an official discussion board, check out the FAQ, roadmap, or grab the source code here.