My suggestion is Des Moines, Iowa - the Silicon Prairie.

- We have a large Events Center that can handle beyond 2,000 participants.
- We are home to several major data centers including Microsoft, Facebook and nearby Google in Council Bluffs, Iowa.
- PayPal is nearby in LaVista, NE (Omaha suburb)
- Dwolla payment gateway is based in Des Moines.
- Pinterest's founder, Ben Silbermann, was born and raised in Des Moines.
- ALL of these companies and many more have a lot they can contribute to further integration of their services into the WordPress platform and hopefully one or more of them will come together and work with the Des Moines Visitor's & Convention Bureau to form an organizing team, gather the information you need - and make this happen!
... btw, the political season will be well over so you won't have to deal with donkey or elephant antics.