Matt,
For the red light pen(s), follow the instructions in
this post here. Please note though, the suppliers haven't sent the pens yet so it'll still be several weeks before you receive them.
Stickers are no problem (and they're free!), just send me a stamped self-addressed envelope (business size preferrably, otherwise they might be folded).
The polo shirts, I haven't ordered yet because there hasn't been enough interest. From my experience with the Astronomy 2006 books, 50 people voting yes does not mean 50 people put money in my account to pay for it. I'm not keen to be out of pocket and left with 30 polo shirts sitting at home. Maybe in the future when there is more interest i'll get a run done.