After watching OutbackBob and HickoryBill work last weekend, I had all the motivation I needed to give knapping a try.  I made a leg pad/knapping bag out of an old leather coat and some tools from rocks and an antler that I picked up the other day on a hike.  I was able to muster two small point like objects out of the bottom of a bottle.  It was loads of fun and just makes me anxious to learn more and get a better feel for it all.  
Please let me know if you have any suggestions on additional primitive tools that would help.  thanks!