yea, even olimpians use video analysis, they have ben since the 70's check out this link and see all the sports that use it....
http://www.sportsci.com/media/default.aspx?video=1005
people use it to make their performance more ieffcient, be it golf, track, hammer trow, high jump, tennis... etc

and v1 and cswing are nice, but motionview is very cheap can;t beat $20 for frame by frame analysis and drawing tools