there are apps that do that already, but I am not sure if that is even the final solution... to give you an example, one day I wake up with a new idea in my head, and all of a sudden I am interested in certain news that I never found interesting before! and there might be some very relevant stuff there for me, which will be filtered out since I wasn't interested in it before...

also it happens a lot that I find something interesting, but couldn't ever find it based on my past history or interests (like some stuff I find here at hacker news)...

also there might be some important news for the day which I want to know about but is not necessarily what I always read about... for instance Amazon introduced Kindle today, I might have not been interested in ebooks before, but I would like to know about it, as it is the talk of the day!

so I guess the final solution might be a combination of all these, my previous history, what other people talk about (techmeme), what other people with more common interests as mine find interesting (hackers news), what the "wisdom of crowd" chooses for me (reddit, digg) ... and what some of the people I find interesting are talking about (my RSS reader)

but I guess if anyone can find the best solution here, they are in for a good ride and big $s