I believe Paul Poberezny did try to start a new organization that was
more true to the experimental aircraft purpose, the Sport Aviation
Association. http://www.sportaviation.org It looks like it didn't
succeed though. I'm not sure why. Maybe lack of publicity, maybe just no
critical mass to get it off the ground.

Stuart & Kathryn Fields wrote:
I've already asked them to consider relinquishing the title Experimental
Aviation Association as they need to rename it more appropriately. The focus
of Oshkosh has been trending away from the experimental side of the EAA.
Also the magazine has lost some meat even though it has gotten bigger. One
year, I think it was 2005, the Oshkosh video sold by EAA did not even
mention experimental aviation, with the exception of some Rutan space flight
data. It did not mention the awards, it only had some Mooney and Piper
aircraft at Oshkosh mentioned. Besides there are a bunch of experimental
aviation nuts that would like to use that title. EAA and its title is a bit
like the US and its constitution. We got it but it doesn't mean what it
used to anymore.