Rise of the Pirate God comes tomorrow. The Telltale Blog has screenshots of that episode for those who can not wait.
If you need to catch up, check out the new trailer that sums up what's happened in Tales of Monkey Island so far.
You'll notice that Earl Boen does the lines of the Zombie Pirate LeChuck from Launch of the Screaming Narwhal, which were originally done by Adam Harrington. In the Mixnmojo comments section, Telltale's Jake Rodkin mentioned that an Earl Boen voiced Launch of the Screaming Narwhal will be released, but he doesn't have any information on when the release date will be.