The Economist provides a brief summary of seemingly everything. It is a bit of a struggle to get through it each week though. Sometimes I question how much I really care about China's economic policy. Sometimes they publish some really fantastic articles though. Much less chaff than most online news sources.<p>I'd recommend that everyone reads at least a few issues of the New Yorker. Some of the long-form reports in there are absolutely fantastic - the kind of article that you still think about months or years after reading. A subscription might just result in mountains of unread magazines though.<p>Not really start up related...
I read Vanity Fair online quite a bit. They have excellent long articles on anything from the making of World War Z to Michael Lewis articles. I find the articles not only educational but very entertaining at the same time.
I also read The Atlantic online for current affairs.