Inside Facebook check top right - theres a “I like” icon and a X to close the feed. I guess if you ‘like’ a particular news item they will show you more of that.. or less if you close it.

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Charl Norman is a web entrepreneur behind some of the top local social networks in South Africa, he also owns a network of successful blogs including Car Blog and Bandwidth Blog, writes for tech and auto publications such as Leadership mag, guest lectures at UCT Grad School and does the occasional public speaking event. More >
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Ja, I notice that a few days ago - a friend of mine in Canada said she’s thumbs upped one of my blog posts - haven’t tried it out yet.
I voted on some content and found it shows less of news feed items you close and more of what you “thumbs up”
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http://valleywag.com/tech/confirmed/facebook-launches-digg+style-voting-325552.php