Patch 3.2.2 will be the revamped Oxynia instance which will release sometime in (early?) November of 2009 to mark the fifth anniversary of the release of the original vanilla WOW game. This instance has the rare drop of the new flying dragon mount and also the free pet baby dragon to all players logged in at the right time. The second link is the mount but the artwork is probably not final.
Patch 3.3 will be the Icecrown Citadel, and probably is the final battle with the Lich King. This is the patch that will introduce the cross-server instances. I can't pin down any dates earlier than Christmas 2009 or early 2010.
Cataclysm will be the next updated release to WOW. WOW Insider believes it will be released in the second quarter of 2010.
The Battle.net material seems to be tied to the release of Starcraft 2. I have no clear idea how it will integrate with WOW or when but Starcraft 2 is rumored to come out the first half of 2010.
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