http://www.forgehub.com/forum/featured-maps/18809-gridlocked.html This was one of the top 5 most fun maps I played in Halo 3. I miss it dearly. Does anyone else remember this one?
I don't think I would necessarily do it a ton of justice. I've been pretty out of touch with Forge since Halo 3. I got really comfortable with the mechanics of Halo 3 (like I knew all the ridiculous tricks you had to know), skipped Reach completely, and now Forge is Halo 4 hasn't quite grabbed me the same way. but I'm thinking I'll warm up to it shortly. Titmar is on the same page as me, haha.
I actually still have Halo 3.. I might have to try it, but it probably wouldn't be the same since we're missing a lot of key pieces like the fences. Although you could probably just replace 'em with coliseum windows.