I put together a Google Map of the US locations for Regionals, to help my own planning and hopefully everyone else's. The map can (hopefully!) be found here. You can view the date of any event by clicking on the associated location.
Please let me know if you find any errors or other issues!
EDIT: Apparently FFG's Twitter account beat me to it! Here's their map, which has the added benefit of giving locations of Regional events for all FFG games.
Edited by Vorpal Swordyou just want your own pinned post!!! IM ON TO YOU!
Woulda been pretty nice to see the Portland Regional a little farther south.
Ugh, I'm in Arizona.
Foiled again!!
you just want your own pinned post!!! IM ON TO YOU!
That thought actually came after I started putting the map together to help plot my own assault on a GenCon bye. 
I guess they got rid of the "Regions"?
FFG's map is missing pins for San Diego and Springfield, Ohio.
And your map, Vorpal, is missing the one in Independence, Mo., but at least you got San Diego and Springfield =P
Here's a small post-imbeddable map I made:
