There's been a flurry of news about Jem! recently, with creator Christy Marx posting this to the Yahoo group:
CHRISTY SEZ: Gather around, I have a special announcement. I've been waiting many weeks for the okay to make this announcement and asked to be able to make it here on this list before anywhere else.
The good people at the Shout Factory have reached an agreement with Hasbro and are hard at work on JEM DVDs to be released later this year.
I don't have much detail beyond this information at the moment, but will pass along info as it becomes available. They originally contacted me to ask me to do commentary and I've agreed to do so.