Posterous - how good is it for SEO:?

I have quite a number of posts on Posterous, but only one is indexed, along with the profile page. Not a stellar performance. I'm not sure yet, what makes the difference, but here, I'm going to try to ping a Juptier Key Homes for sale post and see if it gets picked up. Jupiter Key is a place I'd like to see sometime, along with some of the other communities in Palm Beach Gardens.