... or tomorrow if you live in Europe. WoWInsider has patch notes, which are far too huge to copy to here and comment in detail. So lets just say this is a balancing patch, adding no new content, but trying to improve class balance and similar issues, as well as fixing bugs. I can only hope that Blizzard will not take several months before releasing patch 3.1 with the next raid dungeon.
I love Wrath of the Lich King, and find its quality level far superior to Burning Crusade, but there is definitely a lack of raid content. There is only a single multi-boss raid dungeon, and that one isn't even new, it has just been recycled. If the next raid dungeon isn't coming in early spring, a lot of people will feel they already "finished" WotLK, which can't be good for subscription numbers.