I had the same problem, then another member helped me join. The owner of the site is just overwhelmed with personal life he can't keep up with the site. Just let me or Buddha know and we both can try and help some people join.
They are currently doing some upgrades to make things easier. He said that he deleted over 30000 spam usernames this week so you may want to try and reregister in the next little bit and it should be easier. Here is a link to the thread. http://1993cobra.com/phpBB/viewtopic.php?p=19906&highlight=#19906