This is an article that talks about some costly things that parents of gifted kids may use to supplement their child's educational experiences. It references Hoagies Gifted Education Page and Mensa.
After poking around the American Mensa website, the local website (which have very little availabe to non-members) and the Boulder, CO and Denver, CO websites, I have discovered that in 2008 the Annual Gathering will be in Denver. Hmmm. I wonder if we'll be members by then.