So you may not have thought the first instalment of the Microsoft Gates/Seinfeld ads was funny. But I just laughed out loud at the second one!
Go to Windows to see it in full fidelity via Silverlight. It's called 'New Family', I LOL at about 3:26 when Gates is reading the kid a bedside story. The kid asks "Are there any Monsters in this story", Gates answers "Yes, but don't worry there's a Firewall". Comedy....huh