Thought I'd point non-library associated people to this site- ALA Online Store: Welcome! where you can buy some wonderful things, even if you do not belong to the ALA. I've gotten two coffee mugs with Coffee and the Dewey Decimal number it would be filed under on the side, as well as a cool super-hero poster and bookmarks that advertise reading. One of the most intriguing and funny posters is one of Stephen Hawking and his choice of book. Among other celebrities on posters are Bill Gates, Neil Gaiman, NYC Firefighters, Nicholas Cage, Orlando Bloom, Susan Sarandon and many others.
Check them out!