I'm slowly becoming more ambitious in my maps, this one taking it up a level from the trade_dispute map a couple folks saw. It's still very much a work in progress and only three "areas" are functionally complete--they just need fine tuning, ambiance objects, etc.
Anyway... some shots of it...
Spawn Room 1:

Since many folks just idle trade servers, the teams spawn facing each other. Easier to see items with everyone in one area. There are a full 32 spawn locations per team, allowing the map to be used on 32-player servers without automatic team balancing.
Spawn Room 2:

The outer spawn area. I had hoped to have in-map camera/monitors on those flatscreens but someone thought it'd be funny to take that out of TF2, even though it's part of Source. *mumbles* I'll probably just make some custom textures for them down the road.
Shooting Range:

Each team has their own shooting range, sporting actual enemy player models that animate and talk when hit. Targets come at 3 ranges, 3 speeds per range. Conveniently there happen to be exactly 3x3 classes in TF2.
Pond:

Really just filler between the two sides... but whatever...
Water Polo:

Functional polo game. First team to 5 wins. No blood no foul. Okay... there are just no fouls. No grenades allowed, though. Cheap demo bastards.
Next on the area to-do list is probably a manor-themed display room of various TF2 items, doubling as a deathmatch area. I'd also like to make an obstacle course area with moving walls, floors, etc., complete with death traps. I'd like to do a CTF game around that area but I'm not sure yet if that's possible as a minigame.