As the many e-mails now flooding our inbox attest, yes, NBC's blocky 1975 'N' logo (which proved a legal disaster as well as an aesthetic one) was indeed designed by New York firm Lippincott & Margulies (now just plain Lippincott). "That 'N' is such a great story," says Dan Cooper, who in the course of defending the honor of the letter 'Z,' pointed to it as a single letter logo gone wrong. "And after it sucked as an 'N,' they went completely nuts and stuck the 'N' over the peacock!" What's the only thing that could make NBC's sordid branding history more intriguing? Disco music! Posted below for your viewing pleasure is Renan J. Sanson's video montage of vintage NBC logos from the 1970s and 1980s, backed by an infectious disco beat. Must-see TV, indeed.