My proposed solution: People sign their articles with a key, and I specify for which topics I trust certain people.
I trust Paul Graham on the topic 'startups', so anything that he writes on the topic is considered a high pagerank for me. Paul can also trust other people on the 'startup' topic, and so they will automatically be ranked high on my pagerank (for that topic!). When I do a search, it takes into account the people that I trust on certain topics.
Please steal my idea and make millions!!!