Hello, I'm interested in finding this out too. My family will be going from April 4-11th. I expect the crowd levels to be high since it will be Spring Break for most kids. The last time I went to Disney World was September of 2007, the crowds were very small!
BTW - I have browsed this site for a long time but I am a new member and finally decided to post. I love these forums!! Everyone is super friendly!