Sometimes they're better than the programmes they break up. Trying out our broadband link found
this site, with examples old and new. My favourite is for Hamlet cigars (in the 'classics' section right at the bottom). Others that may raise a smile are Fosters (another particularly good one), British Telecom (with Maureen Lipman as the archetypal grandmother), John West Salmon, Living, The Lynx Effect (the second one, in column two - A Man's Idea of the Perfect Woman?), Olympus Trip (also in Classics section).
You'll need Realplayer.