http://bungie.net/Forums/posts.aspx?postID=1188446
After Thanksgiving sometime...
New: All team slayer
New: Unranked FFA (so you can take a party into FFA games)
Major Clan Match - adjusted to be 5-8 people, with a max difference of 1 (instead of 6-8 with no max difference, previously)
Big Team Battle - adjusted to allow up to 8 people in a party (instead of max 5, previously)
And they adjusted the randomization.
Sounds good.. cant wait till they release this update.