blogsnow: "blogsnow was specifically designed to be the fastest blog news aggregator
possible: 5 to 12 minutes after a blog entry has been saved it will exist
in the blogsnow index. below every topic you will find a link called 'track this ...'. On those pages you will find weblogs that discuss the topic in question."
If you already use a different site just add blogsnow for a few days. You will be surprised how many of those 'emerging topics' on other sites will be visited links for you.