Roger von Oech (most famously creator of the Creative Whack Pack) blogged about this Google Video of Glenn Gould playing 31 out of the 32 parts of the Goldberg Variations. (For whatever reason they left out the Da Capo repeat of the opening aria, spoiling slightly the perfect symmetry and balance of it).
Still, it's great seeing Glenn Gould performing it with all his facial tics and weird vocalisations. Sometimes I think that I make the same sort of grimaces and noises in meetings (minus the creative genius, of course.)