Funny thing is, I predict any BD release to be open matte since Cameron has a tradition of reformatting to fill TV screens.

HDBits has several versions. I see they have a 1080i DVB/mpg2 version from some newsgroup (not many details, not even AR) @ 15gb and a 1080p x264 version (possibly DTheater sourced with a downmixed audio track).

They also have a standalone rip of the original full bitrate DTS/DTheater audio track.

The rest are 720p (including an open matte one). Funny thing is I don't see the version that I originally got there which was the open matte 720p with the DTheater 1510kbps track.

The point being, I'm not sure there is a 1080i/p version that's open matte.