Yup, the 1080p HDTV version is out now (link in the comment for the episode). It is 7GB, so please remember that it will take a while to download.

A 720p version will be out later this evening for those with less powerful computers.

Update: Emphasis should be placed on the “powerful computers” part. Unless your computer is new and fast, chances are you won’t be able to play 1080p videos smoothly. They are very hardware intensive. For details and help with video playback, I’ve written a guide. -Viper