Ask HN: Thanks for helping me with my talk, now I need your help for charity

Last week I asked for your advice on how to talk in front of a large audience. Thanks for all the suggestions & links, much appreciated. This is last week's discussion: http://news.ycombinator.com/item?id=1937170

Many asked what this was all about. I can lift a little corner of the veil now : I will be talking onstage at the LeWeb conference in Paris in order to raise money for charity:water. I've been swimming to raise money & that's what I'll be talking about.

http://www.leweb.net/agenda/2010/program

I have no experience whatsoever with raising money for charity, so if anyone has suggestions, chip in below. I really want to make the best out of my five minutes allocated & raise as much money as I can. Any tips on increasing awareness & virality of what I'm doing would be great.

I've prepared this blog as a starting point, suggestions welcome: http://www.coldwaterswimming.com