Not really anything in mind. Like you said, SEO is just good quality content. Think about your target market, and use a lot of keywords and phrases that people might search for that could lead them to your product. Thread tags help a bit, but I'm not sure if we have those here.
Totse2 had two threads that drew a lot of outside attention. One was the how to make a homemade bomb thread, which I posted here. That one even got us a two-second mention briefly on CNN. The second was the SNB meth article, that blew up with comments and had literally a million page views before it was removed. We saw how that worked out for us.
With the activity we have now, we just need to encourage people to contribute some quality content. You can throw money at Adwords and the like, but none of it will matter without having the content already here. When people monetize blogs and have a big following, they start out talking to themselves a lot. Then they slowly build a following. Then they have exponential growth, and then they monetize. Not saying that's what we want to do here, but it starts with the content.
