Hey all! :)
I spent just short of a few days toying around with an idea I had for a refreshable braille display using an ardunio. What I ended up creating is only a prototype (and is probably a bit larger than it would be in a real world implementation!) but the principle is there and I think it's a nice idea.
If you want to have a look I've got a short blog post about it (with schematics, images and a video) up at http://hitherejoe.com/brailleuno/. Any comments and discussion would be appreciated!