Direct Response TV, a.k.a. Infomercials
According to this article on AdAge, infomercials may get cheap enough due to the economic downturn to be a profitable business model (again). From this article “…air them on late-night cable at $1 per thousand viewers.” Yes, that’s right $1 CPM on TV.
Unrelated, but interesting, fact reported in this article: 24 million units of PedEgg at $10+ a pop. That’s one for every 12 people in the US.