MY CAT TOLD ME! (hes a closet aquanaut) -joe at n-depth scuba, the grooveyest dive shop in az, told me about it as well a our meet up group.. b.t.w. you ALL should check out a meet up group in your area or start one!! its a great way to socialize with other divers in person and its great therapy when its too cold to dive!!! http://scuba.meetup.com/155/