So if your profile says you are single, and looking for women, single women looking for men might soon get a higher ranking in search results? I'm not sure what other "intentions" facebook might know about
Of course, this could open up a whole new era of social networking: I'd call if AdFaces. If you feel that you are not showing up often enough in search results, you can bid for clicks on your profile with a CPC model. Or maybe Facebook can experiment with a cost-per-action model. Then we'll need a product like Facebook Analytics to improve profile conversion rate, and FaceSense to allow publishers to embed targeted profile advertisements on their website.