Interesting link - I may sign up one day.
I also checked out that link to the Nevada Mine Explorers listed under your profile. Good stuff! Playing in dangerous abandoned mines many years ago is what first prompted me to try caving.
P.S. You might want to have your website person run a spelling/grammar check on the NME home page some time...
(friend/friends, repelling/rappelling, sqeezing/squeezing)