Free Mailing Labels From Cystic Fibrosis Foundation

http://www.cff.org/GetInvolved/MailingLabels/

You can choose between a "roses" theme, or an "America" theme. Note that the email field is not a required one -- no doubt these guys are going to send you tons of "please donate" snail mails but that's the price of those "free" labels, huh. It's a good cause if you were going to pick one -- it's a fatal genetic disease that kills the average patient by age 36. 30,000 people in the US have it, but 1 in 31 people are carriers.