On the day we’re publishing a piece about :15 spots on the new MTV online service, the NYT has a piece about shorter spots gaining ground on TV. Meanwhile, I spoke to someone at iTV ad agency BrightLine Partners yesterday regarding Reebok’s debut of long-form content in the VOD environment. Could it be we’re seeing things migrate to :15s and shorter in more interruptive environments, and to longer forms in opt-in environments? It’d certainly make sense.