I have just posted an eBay auction for a Lego Writing System 1999 Adventure Set. I used to use the pen at work. It was a bit geeky, but I am a computer geek, so it worked. After I left that place of employment, I put it back in it’s case and didn’t take it out again. I found it in a box in the basement. Since I wasn’t using it, I thought that someone else may like it.
[Updated 2/17/2008] The eBay sale ended with no bids. So, I still have the pen set. If anyone wants it, feel free to contact me directly and we can work out something.