Facebook Notes SEO

Does anyone have any experience or knowledge of whether or not facebook notes are useful for seo these days?

I know in the past that they gave you search friendly urls for the notes, but now it seems to give an internal facebook address without keywords.

Anyone?

Yea I'm doing experiment with facebook notes now, you can see on google they rank high for exact specific product keywords, but I find that after I create the note there are two different permalink urls, if I'm still logged in the url appears keyword rich, but if we log out or open the note from different user then sometimes you may see the notes url created has no keyword at all.