I'm unsure that there is any appetite for this subject, but I do think hair care / products is a separate subject to the shave topics; pre-shave for example is the procedures for preparing / cleansing the skin before applying the shave soap / cream etc. Hair care is really a separate topic of it's own; but as said, perhaps there is not much interest in this topic on a predominately shaving forum?
In saying the above; there are many other non-shaving forums that have many great and informative posts ie The Dressing Room etc