Since they are in the final stretch, the promotion period will begin, which will consist of IGN dedicating a week of coverage to the game beginning on Monday. They will also be announcing the release date as part of that coverage, as well as including an interview with preview footage of Act 2.
Since the game is at release candidate stage, 2 Player Productions has nearly finished filming the next episode of the Double Fine Adventure documentary about the project, except for a few interviews. They are going to be working on making a final cut of the episode and making a final audio pass, and then the next episode of the documentary will be released as well. The project is truly reaching the home stretch now.