You have mentioned ways to increase my exposure, but there is nothing that indicates that it will boost my salary.

I happen to BE the expert in a major software package that our company uses. I have been for 4+ years. In that time I have not even gotten a pay raise (in fact due to economic situations I had to take a pay cut). I am not necessarily relishing the prospect of going into management, but that seems to be the real only alternative (at least for me).