Not as much as I should. I've advertised it on my twitter a few times, and I like to think the 500 or so followers helps.
And as for charging for your submission, I dunno that that's the best idea for a jam game (says the guy who just did it). I charged because it's a project that I'd already been working on, and I just used the jam as a deadline to help push myself through.
This being said, I'm sure it would be fantastic if you gave a commercial release a go for whatever it is you push out next: it's great for seeing the other side of game development.