Dale: Do you have Windows? Movie Maker will do it, and its free
When it downloads/imports a file, it breaks it into clips automatically, which takes a while, but leaves manageable pieces to work with. Seems to be nearly random where it does it, and you'll need to stitch some too short ones back together, and break other long ones. I had tried it once about a year ago and it seemed really confusing and hard to figure out. When I tried it again a week ago it seemed very easy, and I figured out how to use the 'timeline' at the bottom properly (of course, it doesn't work that well and the sound track time doesn't quite match what it exports, but hey its free). So my advice is to try a couple of short bits to figure out how the program is organized on the interface and how it works a piece at a time, and don't invest too much frustration at first, just wait a day.
I found I dropped out the clearly junk stuff quickly, but still had 20 minutes of video left, and it was really hard to chose what was left to cut it to 6 minutes!
And don't be shy of putting it on the net after, I've been very surprised at the reaction to mine, which I was considering a practice run, I didn't get a single "lame" comment (I expected lots with a longboard in pretty light winds and flat water). What people really seemed to like was the background of the Victoria waterfront - I guess its exotic to other people. If you have shots that show some of the big trees at the Nat, the crazy camping, kids playing in the river, etc, put a couple of those in between the kites lofting and I guarantee people will love it!
I haven't tried out any other programs yet. I was ready to buy one based on a computer magazines 'best buy, editor's choice' but luckily went on to read the comments, which were universally "total crap, couldn't get it to run without a fresh install of Windows" etc. There was about 40 comments, and the average consumer rating was 1 out of 5 (and many said they would have rated 0 with the option). So I decided to stick with Movie Maker to start, and saved a hundred bucks.