There is also a whole forum here on APUg devoted to just that idea:

http://www.apug.org/forums/forum205/

Forum: Silver Gelatin Based Emulsion Making & Coating: Discuss hand made emulsions, emulsion making technology and coating. Papers and film.

As well as a very good website (run by an APUG member) devoted to the same:

http://www.thelightfarm.com/