The beta client was patched against last night, and the process was nice and smooth. The realms were actually up earlier than their estimate, which was a shocking difference from what we see on Live realms. Of course, Live realms see maintenance at the same time, so maybe that was the difference. The patch wasn't a big one by any means, it was actually quite small compared to the last one.
This patch is mostly Mage and Shaman changes, but it also contained the beginnings of Blizzard's built-in threat meter. I can't say its the greatest implementation ever, but it's a start and the information it provides is already proving itself infinitely useful to mod authors such as the fellow behind Omen. More on that another time though, you're here for the patch notes and the patch notes I shall provide. Check behind the cut for the recent changes according to the candlestick.