I just have to share an amazing little gem for those interested of fitting a video camera on-board. 15g of joy. I can't imagine what else to buy for those money. This link have a complete coverage of all aspects of this little miracle:
http://www.chucklohr.com/808/
After you have read it you will realize it's one of the four different version you would like to have. (It can be a bit confusing at first)
/Håkan