It is a compromise between fuzzies v. utilons because I am unable to purchase them separately along with some other constraints. If the money goes to a charity I get more fuzzies, and given that whoever would do this would likely pick a charity that I consider to be a worthwhile charity (given the general framework of LW) there's a high chance that it will produce heavy utilons. I also don't have that much money so I can convince myself to part with more if I know that it is going to a charity rather than going to someone's personal use.
Thanks :)
EDIT: I am canceling this contest because I feel that the structure of the incentives were poorly thought out (see gwern's comments). I will be posting a new better structured contest in the near future (now posted). If you feel this is unfair or otherwise feel slighted, please contact me at my username at gmail.com.
I'm interested in making projects happen on Less Wrong. In order to find out what works and to inspire others to try things too, I'm sponsoring the following small project:
I hereby offer a prize to the first person to submit a good summary of the evidence on Spaced Repetition to the main page. The winner will get the prize, currently: $265 + 40 to charity (see comments)
The summary should address at least the following questions: