Let's be honest: We don't need Larian to work on a public beta for us. I bet that most of the people here interested in the beta have already bought the game through Kickstarter. We're not that important - people who haven't heard of Dragon Commander yet - are.
Lord Crash has it right that the most important thing Larian can do is to crank up the press machine. The good news for them is that it's not going to be as much work as promoting the Kickstarter. I'm not asking for website updates merely because I, personally, am interested in learning more (although I am interested). It's so there is more that I can tell to other people who have not already bought the game.