I was contacted right after Christmas by a producer who was working on a TOTGM DVD set for Universal. He was in charge of extras, but had never seen the show, so he asked me for help. They knew how to contact Stephen Collins, but nobody else. The first person I got him in contact with was Jeff MacKay. The producer later called me back really excited. He had talked to Jeff for 20 minutes and was now planning on doing commentary for several episodes and interviews with whomever he could get. He stated that everybody had to be in the studio by the end of January (I assumed that Universal was planning on releasing the set in May to coincide with the Indiana Jones and the Kingdom of the Crystal Skull
release.). I later got an e-mail from him where he mentioned that Universal had given them more time. I last heard from him 6 months ago when he told me that the DVD had been pushed back and no release date was available. He also let me know that none of the interviews and commentaries had been recorded yet.
I don't know the reason for the delay, but I have noticed that Universal Studios Home Entertainment's TV on DVD slate for 2008 is, with very few exceptions, recent/current series or long running, older shows that they were already releasing in season sets. I've heard rumors that GE, which owns NBC/Universal, has slashed USHE's budget, resulting in fewer releases, but I can't confirm that.
Anyway, I'm not holding my breath for Universal to put out a set, and even if they did, without Jeff, it wouldn't be nearly as good as it was originally planned to be.