Blog/News Aggregators

If you need to keep track of what's the latest buzz about in different blog worlds these are the must view sites every day (multiple times, if you need to know everything like me :)).

• Politics: http://www.memeorandum.com/
• Celebrities: http://www.wesmirch.com/
• Technology: http://www.techmeme.com/
• Baseball: http://www.ballbug.com/

All of them are owned by the same group/person (Gabe Rivera) and most likely have a very similar algorithm.