Well there is a marketing board, and two marketing groups
Additionally Songstuff is likely to be bringing out some music marketing products in the very near future. look out for an upcoming poll ask members what problems they need solved. There will be a couple of very useful freebies being given away to those who fill out the poll. Apart from that we have several music marketing articles and you can always ask specific questions on the boards and I am sure you will get some useful answers.
I started the Songstuff Music Marketing group a few months ago but I have done very little with it so far. I was diverted by the unplanned server move. Then of course I had to catch up! Now I have I will be doing more to push that group ahead.