Last week over at bungie.net, the Bungie Weekly Update hinted at something big dropping this week, and here it is!

After launching to incredible acclaim and fanaticism, “Halo 3” players will be able to enjoy three all new multiplayer maps on Dec. 11 as part of the Heroic Map Pack, the first in a series of downloadable content from Bungie Studios to come via Xbox LIVE.

These maps will be available on the XBL Marketplace for 800 MS points ($10) and include Standoff, Rat's Nest and Foundry—all fully customizable in Forge. Also of note, these maps will available for free in Spring 2008.