I still can't believe anyone on the staff thought that Megaword was a good idea. Particularly when the answer was OXIDIZED.
I wonder how many other puzzles in the main game haven't had T, N, S, H or R? Only other one I know of is PAYDAY as a Speed-Up in 1999. (I think this round may have been cut for time, too, since I can't imagine contestants going for H, D, P, M, etc. without having first taken care of the more common consonants.)