Until yesterday*, this one was team reddit's favorite, so putting it here in the middle of the week seemed like the highest honor (traffic usually peaks for the week around Wednesday).
DonorsChoose is indeed a splendid charity -- it's a great execution of a clever concept. I've done some shameless promotion of it in the past, ever since Joel Spolsky turned me onto it.
Celebrities are using it, too. The View host, Sherri "world is flat" Shepherd, is herself a donor -- a Chicago public school classroom received a globe and geography kit in her name. (And according to her comment, I'm getting lots of Heaven credits for it. Yay!)
Alas, Mrs. Shepherd did not submit a reddit logo.
*The inquisitive among you are probably wondering "why until yesterday?" The answer to that question will come tomorrow...
Don't get your hopes up for anything too interesting, you'll just be disappointed.