I have a Gopro Hd, most amazing and well worth buy I have come across, if you are serious about action sports and want it filmed, than this is the way to go!
I have a little video I put together last night from paintballing last saturday, check it out
I also took it snowboarding and got incredible footage, it captures breath taking scenery, I was blown away! I didnt post snowboarding footage because I have not had the time but I made this short clip but it was dark - trust me during the day it is beautiful! I recommend the Gopro!