Here's some mast top footage:

http://www.formula16.org/videos/zandvoort1.mov

or

http://www.formula16.org/videos/zandvoort1.wmv

(same video, different format)

Mount it on the front of the mast with a wide angle lens and you get a pretty good view on both tacks.

Here's some spin pole footage:

http://www.formula16.org/videos/mumbles.mov

Again, wide angle lens so you can see the crew on trapeze.

These are both done with a helmet cam wired to a hard drive video recorder (the second is done with a particularly cheap and nasty recorder which got replaced). I keep the recorder in the tramp pocket, which allows you to turn it on and off easily.

Paul