Hey guys, I am a keen wakeboarder, skateboarder, and skimboarder and love doing all of these activities with my friends... until i got a knee reconstruction last week and cant do anything for a year :(

SO... ive decided to take up movie making and editing of my friends doing these sports and make a movie, however am extremely un educated in this department.

What type of camera should i look at buying, and what program?
I have seen guys at the skatepark with a "fish lens"... is this a good idea?
also, if you could give me a general price range that would be great (i am in australia so i will do my best to convert :p)

thanks guys!!!