Since I started to share the Stribe Project, I've had a lot of questions about why don't I use the LEDs as sensors like Jeff Han, and skip the touchstrips. I actually started down this path and came up with a couple of ideas, but then decided it probably wouldn't work, figuring the emitter LEDs would bleed into the detector LEDs. Well, I was wrong... Yay!
Check it out:
Here's the project blog: http://natebu.wordpress.com/