A few items of note that slipped through the cracks lately:

ForgeHub is a site featuring descriptions and links to custom maps and gametypes people have created in Forge. Some very interesting stuff up there now, with more sure to follow.

High Speed Halo is still getting up to speed on Halo 3 speedruns, but for a taste of coming attractions visit goatrope's file share for some runs on Cortana, Floodgate and Halo.

Stuff.co.nz has a nice biography of Bungie's kiwi wunderkind Chris Butcher up.