I always wanted to try making Daguerotypes, the final product is one of a kind and extremely beautiful. From what I read the process is difficult and dangerous, needing specialized tools, fuming hoods etc. You can watch the steps involved in this Japanese video, its quite extensive with lots of equipment I do not have being used. I must try to find a way to do these someday thou. To do Daurreotype one of a kind portraits would be very exciting.
http://www.youtube.com/watch?v=eiHuO91_ATE