We've found this:
http://ukcaving.com/board/index.php
http://ukcaving.com/wiki/index.php/Main_Page
There's something familiar about it that we just can't put our webbed finger on 
Hmmm, I can see that you obviously have a great interest in Irish cave diving, are you sure the lure of rock is't pulling you from steel

Actually, to be fair, that site is primarily 'dry' caving, and not cave diving. Yes, there are a few of us members there, and they do have diving sections, but that was because there were not ay really appropraite places for cave 'divers'...until now

Have a look through the Irish sections, there is more support on here both on the forum and wiki, and yet both areas are younger on here. See, we love you truely

Though, that site is still useful for help with the dry sections and geology of caves etc.