http://tools.fantasyflightgames.com/iwp/2014-game-thrones-card-game-regional-championships
Here is a handy-dandy map (full credit to Crevic for putting this together!) so you can find your nearest regional: https://mapsengine.google.com/map/edit?mid=zWR44iRBEU8s.kxTHFUiu2gfw
I am excited for regional season, but it's a bit of a bummer that the new "2-per-region" rule is so strict that we actually have fewer than 16 regionals in the US. The layout of the regions is a bit rough on the midwest, too, it appears.