Litographs - This site prints the full text of literary works onto t-shirts, posters, and more.
Out of Print Clothing -This site has created t-shirts, iPad/iPhone cases, tote bags and more out of the original prints of book covers and they donate books to children around the world. What's not to love?
World Book Night - You can apply to be a Book Giver and hand out free books to people on April, 23 - Shakespeare's Birthday. It's spreading the love of reading, person to person.
Book Riot - This website has fun and interesting litgeek articles and ideas.
Cafe Press - This site does custom apparel but they have a huge bank of already created literary products. You can search the site to show your love of Heathcliff, Gatsby, or Godot on shirts, hats, stickers, and more. Don't like what you see? Create your own!
Storiarts - Wearable Literature. Show off your great taste in books. They have a number of classic titles in stock as well as options to have items custom made so that you can wear your favorite book.