Halo 3 got its first matchmaking update yesterday in a server-side patch. Bungie will do this throughout Halo 3's lifetime as they did with Halo 2.
The changes are all positive. Hit the jump for the list:
* Big Team Battle matches are now 16-player affairs.
* In the Team Slayer playlist, the appearance of Shotty Snipers has been greatly reduced.
* Now, when players veto Shotty Snipers, the game that results from the veto will not be Shotty Snipers.
* In one-sided VIP matches, the attacking team will now see a waypoint for the VIP they are hunting.
* In Lone Wolves, Slayer gametypes will appear more frequently.