There are also some web forums at this site. There are several people from apug who frequent there. Kerik is over there (he has the same username here and there) and he has done some really neat stuff with wet plate.
Quinn Jacobson has just put out a book titled, "The Contemporary Wet Plate Collodion Experience". It has the information regarding the chemicals and materials you would need to get started in wet plate.
Buy John Coffer's manual and DVD set ($75 for both). Coffer's mailing address (the only way to contact him as he has no email, phone, or electricity) can be found on http://www.johncoffer.com.