With a title shamelessly stolen from the countless "Vote early, vote often" posts around the network.
In the frenzy of the launch of a new private beta, there's a whole lot of activity going on and it's easy to focus on the Q&A. Remember, though - building the community around this site is important too!
Every new Stack Exchange comes with a chatroom. Yours can be found here - it's also linked in the Stack Exchange site switcher.
Chat is a useful tool to have in private beta for building the community - not only can you kick back for a while, it's also important to communicate with each other about the stuff going on around the site: what do you want to be on-topic, off-topic, closed, not closed, etc?
Chat is a useful tool, so remember to make use of it.