ARAM

EDIT (27/03/2013):
Warning!  This tier list is very out of date, it was created back when ARAM was played on Summoner's Rift.  The change in maps caused a huge shift in ARAM meta, while champion buffs/nerfs/new items and the whole stick causes a smaller shift in the tiers. 

I plan to post a new ARAM tier list in the near future, I've recently started getting back into ARAM to better learn the new meta and see how the champions stack up against each-other.  I AM recording stats for my matches now, how well all 9 other champions do (I'm not recording myself because my own skill with champions would skew the results of my tests).  I however do have other important work to do, so gathering this data + posting a new tier list may take a few weeks. 

As a sneek preview, My data's currently shown Teemo perform well in 5 aram games, winning 4 of them with an average k/d/a of 11.8/10.6/19.0.  He's also had a solid performance in 4 of those games and a weak performance in 1.  This makes him look like he's going to be top of tier 2 or bottom of tier 1 material. 

Peace all
/EDIT


ARAM (All Random All Mid) is an unofficial game mode of League of Legends that can be played via custom games. It involves adding a number of player imposed rules to a regular game on Summoner’s Rift. To play ARAM go to custom games and search for any game with ARAM in the name. Note that ARAM is not the same as ADAM or ARAZ or ARAB, although ADAM (All Draft All Mid) uses the same rules and tier list.

A brief Summary of ARAM rules: All players must go to the middle lane, may not leave the middle lane and may not heal or buy at their nexus unless they die. Exception: if a team’s middle inhibitor has been destroyed their players may heal and buy at their nexus.
Revive and Teleport are banned spells, Majai’s Soul stealer, Leviathan, Sword of the Occult and Guardian Angel are banned items.