Is there an online store where I can buy CiviCRM stickers, t-shirts, books, etc? Should there be?
I can buy the new, second edition of Using CiviCRM by Erik Hommel, Joe Murray and Brian Shaughnessy on Amazon.com .  

CiviCRM.org could set up a store on CafePress.com to sell t-shirts, stickers and other stuff. I would buy some stuff that way.