Re: tobacco leaves
I make my own shisha all the time and give away a lot to chums of mine who like it. I strongly strongly suggest going with traditional tombac as the base tobacco and use high quality pipe tobacco in small amounts. Given that cigarette tobacco is crap quality and snuff & chew have poor cuts for shisha i'd suggest you avoid them.
If you want to buy tombac get it from Hookahs Etc as he as it at good prices.
When I get the time i'll put up a big, step by step article about how to do it.