I know! Why don't we all spend our money printing free information off the internet, bind it in covers and clutter our bookcases with it? Wouldn't you like to own books with titles such as "Toasters," "Penguins" and "Antidisestablishmentarianism"?
PediaPress is charging as "little" as $8.90 per book, with the prices varying depending on how detailed your chosen subject may be. Some of the proceeds do go to the Wikipedia Foundation, but really—when you've got to the point in your life where printing pages off from Wikipedia and paying $8.90 for the privilege seems like a good idea...you need to be banned from society. Or at least have http://wikipedia.org banned by your ISP. [PediaPress via DVICE]