Here's a great game between Idra and WhiteRa. Idra is a phenomenally good zerg player, so hopefully you'll be able to take something away from this match.
http://www.youtube.com/user/huskystarcraft?blend=2&ob=4#p/u/9/uTo0f7voeRU
http://www.youtube.com/user/huskystarcraft?blend=2&ob=4#p/u/9/uTo0f7voeRU