Saw it on tele last year. I am thinking of entering a team myself this year, but am having trouble getting details.
If you get anything please let me know.
My understanding is that it is a competition over a weekend with teams of 6 or 7 played on a huge beach. They have a league system leading to the normal 1/4 and semi-finals before the big final. Its a mixed thing apparently as i seem to remember it's beach touch rugby.
If i do find anything i will PM you with the detqails, please do the same if you get info.