New Mexico has been selected to host the X-Prize Cup.

[Update]

Here's more info.

[Another update]

Here's more from the New York Times. It's very confusing--they seem to be conflating the Ansari X-Prize with the X-Prize Cup, which will be a separate annual competitive event, much like the Americas Cup of sailing.

[One more]

Leonard David has fleshed out the story more, with a better explanation of what the X-Prize Cup (which is what this story is about) is about.