Re: Star Trek films on Blu-Ray... what we know so far
For grins, I checked Daren Dochterman's site in case he might have any updates. He has a forum and for Star Trek The Motion Picture, he's done a FAQ style post to answer all the common questions:
Yes, the work is ready to go for a Hi Def transfer.
No, he (and I assume a team) has not rendered anything in Hi Def yet.
Yes, he'd like to do the work on the Hi Def transfer.
No, he has not been asked yet to do it, or heard from the studio yet.
That post is almost a year old. I hope there is news and I don't doubt it will happen. Seems the love for Star Trek The Motion Picture grows more and more amongst the fan base.

And I'm sure the studio knows it.