A new post on the Left 4 Dead Blog describes plans for the next update for Valve's co-op zombie shooter, saying a new version will be available next week that concentrates on custom campaigns. Included will be new support for third-party campaigns, a retooled matchmaking system, and the non-beta release of the Left 4 Dead authoring tools. Also promised is a new update on their Developer Community wiki on how to package up your custom Left 4 Dead campaigns and add-ons.