To get a general idea what the site does, go to 
http://gnomewarrior.com and just press "Submit" without choosing a BG or entering in a team name. 
BUG VULTURE A LOT TO MAKE AN AUTOMATIC UPLOAD CLIENT
Love, 
Krevitz
Here's a description of the site (copy/paste from my About page):
I wish Blizzard’s Armory tracked results for arena teams, so you could see whom they defeated and lost to on their rise to the top. 
I wish it stored overall statistics on how well certain make-ups faired against other make-ups based on class, spec, race, rating, etc. 
Since Blizzard’s Armory doesn’t provide these services, I developed a website that does. 
If you find this project worthwhile, and would like to contribute data, then you’ll need to do a few things first: 
1) Create an account on GnomeWarrior.com. 
2) Download the Arena Historian Mod (developed by Mayen of US-Icecrown) from WoWInterface.com, and use it to log your Arena Matches to a file. 
3) Periodically upload your arena match log into the GnomeWarrior.com database. 
Even if you think this website sucks kodoballs, I hope you can still at least appreciate the enormous GnomeWarrior.com logo. It took me like three hours and a few dozen King Mukla respawns before I got the perfect screenshot to complement my sexy gnome body.