Collectorvision will be there (well, Gamester81 will be selling Collectorvision products) with Space Raid 2600.
Fred Quimby will be there as well with the new Harmony Encore and will be upgrading older versions of Harmony.
Good Deal Games will also be there with at least 3 new titles that haven't been mentioned here yet.
Failboat (by Peter Holland Jr.)
Thirty copies were made and Peter G hand autographed each label prior to the laminating process so that each is it's own unique collectable.
Road Duel (by Stephen Smith)
Stephen will be appearing at the Good Deal Games and Homebrew Heaven booth throughout the show, signing the back of his cartridges.
Rocket Pod (by Robbie Hill)
Rocket Pod is a game where you steer your rocket around and land on the pod.