Donations to Wikipedia
I just discovered that the Wikimedia Foundation has gotten its act together (proper books, 501(c)3 status, etc), and is holding a fundraising drive. Those who use Wikipedia as much as I do might want to consider a donation: I think it's an invaluable resource (I use it a couple of times a week for work), and their hosting expenses ran over $600k last year. For more info, check out their FAQ, or just go to any random Wikipedia page -- they've all got it as a header at the moment...