We have the Wave very active east of the Rockies with more regattas than any other class that I have seen, now with the following major regattas:
Great Plains Wave Championships in Kansas
Midwest Wave Championships in Indianapolis
East Coast Wave Championships in Sandy Hook, NJ
North Coast Wave Championships in Put-in-Bay, OH
Atlantic Coast Championships in Duck, NC (Outer Banks)
Southeast and North Americans at Melbourne, FL
West Coast Wave Championships in Havasu, NV
Nationals in Key Largo

By the way, Hobie is supplying at least 20 charter boats at Havasu.
The Wave is the least priced, but fastest growing and most fun and competitive class you will want to see. No one dominates in this class.
Rick