So when SEO and domaining meet, it gets very interesting. Aside from the obvious competitive webmastering issues we would expect to see, Google is playing a major role in determining how the domainers-as-seos succeed, and how much work is involved. You see, Google is currently crediting parked-page backlinks with enough value that a domainer can boost a page in the SERPs with very little effort indeed.
Yikes. If this SEO method (or cheap trick) makes it still harder for Google to deliver reasonably good search results based the true popularity of a site they're going to have to move to the DMOZ model and hire a lot more humans.