Beta 1 is ** today**, which means that we'll have people who are going to start asking questions here, so we need to stay on our toes, update existing questions (more below), and just generally keep an eye on things so we don't get battered like we did for 11.10's release cycle.
Other than the HUD there's not many major user-visible changes, so we can likely just update questions by removing the version tag and making them more general, so they likely need some minor editing as well.
Here is a list of questions with both 11.10 and unity. If the answer still applies for 12.04 then we can likely drop the version tag (which is really a meta tag anyway).
Like last time I will be bounty-ing large questions that need to be updated, if you'd like to help by offering bounties on these questions then that'd be slick!