An idea but isn't the blog best for that now? And just recently, you can ad a note on your portfolio to announce anything even a show.! To me that is where you could promote something different each week!!!
How about one of our artists here is chosen each week to answer a few questions about themselves and their work. A kind of interview/get to know the artist kind of thing. Something that other AW artists AND outsiders can come across easily and maybe subscribe to. It would be something that us as artists could put on our website or FB page which would link to our AW galleries?