Bukkit

What is the enhancement in mind? How should it look and feel?

I think that there needs to be district numbers such as tributes 1 and 2 having a prefix of a 1 representing their district in a noticeable color like the &4 red. It should stand out and give more of a hunger games feel to the plugin.

Yeah.... that's a good suggestion.. I just need to look at what I can do!

Wow that would be cool :-D

Try looking into TagAPI for adding colors above player heads. They have ways to help with that.
This would certainly be a good idea to do, although I am a bit concerned for players that have larger names that reach the limit in minecraft coding.

If I could add on to this suggestion, can there be a way to manually team up with someone else?
For example, you join the arena with a friend. You both want to be together, so you both do
/ha district 1
You now have joined district 1 with your friend, and no one else can join district one as it is already full because of you two.

And doing this district thing is optional, because if you don't join a district it automatically gives you an open district to represent when the game begins.
A district can be changed at any time before the arena starts.