1. This site hasn't stopped being about startups.
2. Lots of people are bored with just reading about startups. Because beyond a point you need new material to spark interesting thoughts. Like many others here I am an entrepreneur for over 3 years and am now working on a web startup idea myself. I find stories such as #3, #5 and #6 useful - they contribute directly to my goals. Remember what stays on top is still decided by the people. And we won't go down the 'digg' path unless the audience that submits and votes changes - which is a problem I am certain PG is aware of and he has made references to some solutions that he is trying to put in place for keeping the stories interesting.
3. I have found that I find stories that PG submits interesting. As long as that is true he is a good measure for the typical audience.
4. Finally between stimulus and response I have freedom of choice. I will up vote only stories I like and I think that might be a great way to participate in the content.
Thoughts??