haha, good spot Dan! i use iPlayer loads, mainly for Moyles on radio 1 while sat at my desk at work, and although i have noticed it goes to 11, never made the connection to This Is Spinal Tap.
on a side note, just yesterday i watched The Invention of Lying, and it has Christopher Guest in it, from the vid you posted here.
RIP Jules, never to be forgotten. #KeepFightingMichael