Hi all,
We were extremely interested in this project as well, but weren't very successful at building our IR pen. We decided to pull some strings and have a manufacturer create an IR pen (believe it or not, it is hard to do... they were hesitant at first because they are used for military and police purposes; hence why they are hard to find).
Any way, long story short is that we sell them now. We are JUST getting started, so give us a week or two on getting the checkout process going. But you can read our story and should be able to order in a few days:
http://www.infraredpens.com/
