General Discussion
I'm considering reviving something I had a while back that worked for a while, but died to outside issues.
I had an arena-style 4E game going. The idea was to use the Dungeon Delve book as-is. Run a party through the first mission, let them gain a level (including upgrading gear), then run mission #2. Rinse, repeat.
It turned out to be really, really popular. I think I had three or four full parties active at one point, with a few extra people waiting in the wings. Then my daughter was born, and my free time went bye-bye. Plus, updating the combats for three separate 4E games was taking a good chunk of my day.
I'm thinking of bringing it back, but limiting it to a single party. God knows that I couldn't manage more than that -- or maybe two -- at a time right now. I'd consider using a co-GM, but I'd want them to basically handle things the same way I did.
It wouldn't have much in the way of roleplaying, unless there are spots in the scenarios that allows for it. Mostly, it would be a tactical exercise, with a party trying to get through each delve as fast as possible.