Good advice, Charke. There have been a lot of these posts lately, and the thing that strikes me most is, as you said, they really don't tell a publisher much.
Dane, in this business it’s about showing, not telling. I can tell a publisher that I'm a good RPG designer, but it's just hot air until he sees my work, which leads me to my next bit of advice. Post some of your work on this messageboard; it's a great way to get noticed (it worked for me).
Also, as Charke said, respond to open calls, get your work out there. One vague post in this forum is not going to net you anything but a bunch of repetitive advice from working freelancers. =]
One other piece of advice: learn 4E, and learn it well. Don't listen to all the negative stuff, there's going to be a lot of work for 4E designers (there already is, actually) in the coming months.
BD