Check the L4D blog for info. It's basically a modder campaign turned official from the creator of 2evileyes (which I didn't really like myself, but I disgress ).

Also coming with the full update later are more L4D1 campaigns ported to L4D2. Yay!

I'm hosting a game for Cold Stream right now if anyone wants to play, just add me on Steam...

They're making an awfully big fuss about a custom map. I'd rather have some real new content from Valve themselves, and not just every 9 months.

Not great anyway. Looks a mess and couldn't even get out of spawn on the third stage.