Fred Wilson is a legend in VC, and he gives short bursts of insightful knowledge on his blog, A VC. Definitely one to add in your RSS reader if you're at all interested in becoming an entrepreneur or getting involved in the VC scene.
Insightful and passionate blog about startups and VC. Filled to the brim with great observations and perspectives. Since I started reading it, I'm better informed than the experts that show up on Belgian television ;)