Has anyone stumbled across a working mod that tracks arena battles? I'm looking at least for something that simply remembers who I have fought (team name, character names) and maybe some of the statistics from the fight.

It would be nice to look up previous teams on the armory after an evening in the arena and track win/loss records against certain teams as well.

There is a mod on wowace.com, available in their list of files, called "ArenaHistory", but when I install it, it seems to do nothing and no obvious slash commands are available (/ah, /arenahistory, etc).

taken from "todo.txt"
looks like it isnt done yet

Someone knows an similar AddOn?

Rupture does this and then some:
Rupture - Welcome

I looked up Rupture, and it seems that their beta has closed. I tried to download the program and the subsequent addons anyway, but it ended up encountering an error when I made an account.

I am very interested in some sort of logging addon as well. It would be very helpful to see who my team is having trouble with, what the damage and healing was for the fights, and other things related to that; perhaps links to the player's armories?

Yeah rupture is closed :-( Anyone have any idea when they will begin offering sign ups again ?

I can send out Rupture invites to people, just PM me with your email.