Donors Choose 2008
The combined effort of the blog community harnessed to raise money for students. More info on this here on DonorsChoose.org
We're a little late to participate and I'd prefer to donate money to local or international charities rather than US based ones. But it is still a nice idea. These ideas always go better the second year as people capitalise on what worked last year and also last years late comers are on equal footing.
As of writing sport blogs have raised only $155. That's pretty sad.