Rejoice, and/or quake in fear oh lovers of the League. EU Patch 10 officially drops this Thursday. (8/13/09) This is to be the largest patch ever applied to the game, with a host of sweeping additions and changes. The headliner being the new game mode, Chaser, a 1 vs all battle where one player is selected to become the avatar of death, and must kill all other players within a time limit to win. Other changes include weapon balancing, new control options, more clothing, and much needed server optimization.
The full list of changes can be found here.