I don't know much about how they consider but I think that I had heard a comment around the Atlanta or Chicago timeframe that IHQ has to find a hotel that has 2 large ballrooms plus meeting rooms, plus handle about 600+ attendees..whether or not we stay at the same hotel...plus (hopefully) consider how easy access (plane/train wise) to get to.
You also have to consider that our Convention is usually prime family vacation time so that would mean places would probably raise their normal price. (I think that the Chapter Pres that went with me to Chicago made a comment to this year's Pres that the price was about $300 more than Chicago but I haven't compared registration, etc. prices. I do know that it was made easier this year with the decision to have a base room price rather than per person. That may or maynot be the same in the future.
I was thinking 2008 may be Dallas since the Texas brigade seemed to be going strong, lol.
After they announced San Antonio, I was thinking that Nashville could be a possibility but then Louisville may be better price wise.
Probably after I quit being Chapter Advisor, they'll have it in the Atl.