UPDATE: Finished. Here are the most recent 1000 comments on Miley Cyrus’ 7 Things I hate About You. YT currently restricts API calls for comments to 1,000 items. There is a ticket to request this number be increased. I suggest you vote (click the little star down at the bottom of the page).
Within the next few days I’ll try to make this bullet proof and get it on the intarwebz.