First update! Got the 25 Mount Achievement this morning (just bought all the exodar mounts and the outlands griffons).

In addition to doing the Argent dailys every day (for the rest of my life!), my first priorities are going to be things that might change with Cataclysm:

-Ahn-Qiraj Bugs. They may not change the zone, but I'll start here anyway. 4 fairly easy mounts.
-Baron mount from Stratholme. The devs said that they would be changing Strat and Scholo, so I better do this now in case the loot changes
-PvP Mounts: Though I'm sure these wont be taken out, they are introducing the new currency systems which will have weekly caps, and they will be introducing Warsong Gultch 2, which I want no part of, so might as well get them now.

My absolute last priorities will be the Outlands reps. Particularly Netherwing and Kurenai. Those are gonna be brutal.

Thanks for all the words of encouragement, and I'll be dropping regular updates on my progress!