Letterizer
The Letterizer will take a string of text you submit and will create a collage of images from photos taken from Flickr for each letter in the string. It's only in beta, so if it doesn't display all the letters or it displays something other than an image of a letter, don't flip out.
As of right now, to keep my serverload and Flickr's server load low, the Letterizer only visualizes the first 100 letters.
The three most letterized letters are
e (156), a (118), and o (106).
frobba.com | make a new visualization | make a new letterization