Valve have posted a patch for Left 4 Dead 2 this morning. Along with the regular old incomprehensible patch notes, ("Cleaned up DLC add-on file dependencies and simplified talker file structure." Huh?) they've finally enabled Steam Workshop support, creating an easy system for browsing and installing new weapons, campaigns, items and - er - clothing. I guess the Venn diagram of fashion enthusiasts and mod creators does have some crossover.
As it's only been live for a few hours, L4D2's Workshop listing is still a bit barren. It shouldn't take long for some top content to appear, though - Left 4 Dead 2 already has a healthy modding community, so, with any luck, some of the best will be uploaded in the coming days.
Adding mods to the game was already a relatively simple process, but of course the Workshop streamlines it down further and, perhaps more importantly, will automatically each mod with any patch the creator uploads.
Hopefully we'll soon see some of the great community created campaigns start to appear, like these brilliant Back 2 School maps.