Personally, I'm going to try to be diligent about monitoring updates for my addons (which is what we all know Mike won't be doing). It's my new-patch-resolution. Unfortunately, there likely will not be fixes for my every woe immediately. While bemoaning my misfortune, I may pop into a battleground and check out what life is going to be like sans deadzone. Heck, I may as well try to get some dailies credit for it!
I'll also have to show my hobbies some lurv. At some point, you might catch me meandering through Azshara with my sights set on a shiny Azure Whelpling, as soon as I feel like hunkering down in farming mode. I'll definitely have to go check out what The Rokk has cooking, and of course, /cry and /whine that my addons are on vacation.
What will you be doing when 2.3 finally arrives? Will you be testing class changes, playing around with your professions, popping into PvP, or starting up "nerf huntarz sine here plzkthnxbye" and "NO U" threads on the forums? Or will you bearly be all business (okay, horrible pun. /slap self), heading out to Zul'Aman?