It's 1:45, I should be going to bed, but felt like throwing this up first.
We just finished another game of Gamma World, run by Josh, using our (WotC) Gamma World characters from last time, leveled up to 5th level, but running a module made for (TSR) 3rd Edition Gamma World.
It was pretty fun. The module, I think it's GW6 Alpha Factor, was interesting. It was written in a choose-your-own-adventure style format, so while it was mainly a wilderness hex crawl, at certain keyed events you'd get a video game style railroady cut-scene that took you to the next section, like it or not.
We had a lot of fun with it, though, and we're thinking about playing some more of the modules, although Josh stated up front if we do more, we'll use pure 3rd Ed. characters, rather than trying to mix them again.
It was a good game, so I'm hoping we get to play some more.