Jorg Ewald - this podcast is about scoring formulas and how they work. It is not aimed at scorers, but competition pilots so they can know more about how tasks and competitions work and why some days are high scoring and others are worth little. It also tells you about what questions to ask, and how knowing a little about this topic can help you prepare better for your whole comp.

There is also a very detailed, 18 page, written explanation of the GAP scoring formula available from the FAI: GapGuide-2011-v1.pdf (written in Feb 2011).