WoW Insider, of course, has covered all the upcoming content in patch 2.4, as well as the changes in 2.3.2, but for those who would love to see a concise summary of the information, laid out in an easy to understand format, these pages at MMO-Champion are handy indeed.
Of course the obvious question one must ask whenever we see a list of "everything we know about X" is: "what about all that stuff we don't know?" I for one am particularly looking forward to finding out what sorts of rewards will be made available from the new Shattered Sun Offensive faction. Some sort of new mounts perhaps? Will there be a flyable dragonhawk at last? What sort of items would make people start drooling at the mouth enough to devote all kinds of time to all those daily quests?