http://www.thebombsurf.com/blog/7/165/too-good-to-be-true-or-the-solution-to-our-worst-fears
Looks like a good product bit more affordable to the average punter !
Topic has come up a few times before but always seemed the solutions were heavy expensive and bulky.
i like the idea of this one being in a leash.. not having to connect it to your board.
however it would only be emitting the signal if you foot was in the water.. so not when paddling or standing up?