Pete, or anyone. I am sure they did not mean to be exclusive. Keep in mind this is mainly a monohull regatta. They are simply reaching out to see if there is any interest in cats.
My guess is if you contacted the Chairman, Brian Gleason, he would invite your boat and your fleet as well. briangleason (at) charlotteharborregatta.com or 941-206-1133.
The Weta was probably invited because there is probably a fleet nearby or within the group.., and they know there are Hobie 16s around.
Rick