Sandy,
I'm in Gilbert - Higley and CHD Heights. I've not met up with the others either.
While I did not see cobras here, there is a small by growing group of cars and its in Chandler.
http://www.cruisinarizona.com/flyers/031409fulton.pdf
I plan to go sometime with my car. I just got my car on the road (~100 miles now), I didn't think it was that fast, then realized I just drove like a granny and discovered the second half of the gas pedal range I was not using.
Other car events
http://www.cruisinarizona.com/cruisenites.html
And finally the AZ cobra club site
http://www.azcobras.com/
Mike