Without a doubt, MousePlanet has a very deep bench of folks who know Disneyland and the greater LA entertainment community. However, people and boards can't specialize in every possible aspect of Disney entertainment.

With that in mind, do folks have any pointers for web sites or message boards that would have better coverage of Disney Cruise Lines?

I've already been to www.disboards.com.

CruiseCritic is a very large forum with subsections for each cruise line and a dedicated "roll call" thread for every single sailing of every single ship.