It's slightly frustrating, isn't it? I'm fundraising for Team in Training and I sent out 89 messages between emails and Facebook. Nine of them have donated and three more said "soon." It's interesting that the people I thought I could count on the most haven't responded at all, and some people who I never expected to contribute (including some people from this forum who I've never even met) have made very generous contributions. You just can never tell.

I'm pretty sure the key is to be persistent, and a whole lot of creativity doesn't hurt either! Good luck!