Just another thought on forum marketing: I haven't done any posting on forums for a few months now, but decided to get back and do some more recently. Sadly, a couple of the forums I'd been participating in had gone belly up. And they weren't small or dying ones when I last visited; they were actually quite large and active.
It's a bit disappointing, because I had maybe 30 or 40 posts on these forums that I was intending to paste to a file and use as raw material for blog posts and articles. But they've all just disappeared now!
So, it's worth remembering that there is a high attrition rate with these forums. And you should save what you've written as you go along if you want to use it somewhere else.