If you want to play with my setup right now, you can look at the HTML source for this entry and make your own message. My current alphabet is composed of the letters 'a', 'c', 'd', 'e', 'l', 'm', 'o', 'p', 'r', 's', 't', and 'w'. I've got a 'b' made from from part of an 'l' (b1) and half of an 'o' (b2) and I've got 'start', 'space', and 'end' symbols. For some real life examples, check out these pictures.
I hope to have something that's easier to use and more interactive once I've had a chance to do some more browser-side coding.