Besides winning or finishing in the top 10 percent of your age group
in a USAT sanctioned event before the end of June, 2007, the folowing
"local" event is a Regional Championship and qualifier for the 2007
nationals:

Bakersfield Triathlon
May 19, 2007
Bakersfield, CA
www.bakersfieldtriathlon.com

A Regional Championship race qualifies the top 33 percent or top-five
finishers (whichever is greater) in each age group for the 2007 Age
Group National Championship on June 30 in Portland, Ore.


Also, the 2007 Age Group National Championship will be a double
qualifier. The top 16 in each age group will qualify for the 2007
World Championships in Hamburg, Germany (September 1-2). The top 8 in
each age group will also qualify for the 2008 World Championships in
Vancouver, Canada (June 7-8).

Also, all U.S. athletes are required to be annual members of USA
Triathlon BEFORE qualifying.

What is "required" to be on the US "team?" In short, although USAT
provides a travel package, the athlete (you) has to pay your own way
and you are required to make a "minimum" purchase--certain team
uniform items--too!

Check out the following two links for more details if this is for you:

http://www.usatriathlon.org/AthleteFocus/TeamUSA/Teams.aspx
http://www.usatriathlon.org/AthleteFocus/TeamUSA/Teams/TeamUSAInfo.aspx