I think there are a lot more Japanese qualifiers this year than previous years, so it would only make sense that there are more stops here. I think in order to match the amount of US players vs Japanese players they would still have the top 8 from each stop, since only 5-8 stops are likely in the USA.
My guesses are:
Los Angeles (which I will win, so don't even bother going to this one :p)
Chicago/Detroit
Denver/Kansas City
Dallas
a Florida stop(possibly Orlando or St. Petersburg)
New York City
Other possible stops are Seattle, Nashville, or Richmond(VA). One 'concern' I have(since I leave near LA) is that they won't have a stop there, since San Diego is where Worlds will be, and they might think it's just too close geographically to have a stop. Hopefully they realize that it's much farther away than the map might infer. I just don't want to travel for my pokemon tournament. =(
@micuat = Interesting to see Yoshimura changed his team slightly but still is being successful with it. Apparently he changed to Dusknoir from Bronzong because of the Heat Wave tutor in Platinum, which makes sense. Memento is unexpected, but it makes room for Metagross to come in and Psyche Up the Snorlax Belly Drum, so that is clearly beneficial. I think the last move on Snorlax was Fire Punch, because he used a Belly Drum Snorlax at Showdown 2008. there's a chance it might be different but I doubt it.