I deleted my facebook account. I could not say anything about it for two weeks though. Facebook is set up so that if you access your account in any way for two weeks after you cancel, facebook treats that as recanting your request to delete your account and restores it.
I had set up my blog to "push" any posts to my facebook account. So, in addition to deleting facebook from my work pc, my home pc, my iTouch, and my crackberry, I had to remember not too blog anything to avoid inadvertently restarting my account.