HTTP Status Cats by Tomomi Imura. The API is also available at http.cat (Thanks, Rogério!)

Tweet me at @girlie_mac if you have ideas or pics recommendations!

(Updated: I am receiving overwhelming amount of comments/suggestions! Thank you so much and sorry for not replying to all of you!)

HTTP Status Codes desc:
en.wikipedia.org/wiki/List_of_HTTP_status_codes