Kevin Spacey schooled Dave Letterman about Twitter. They made fun of John Stamos, sarcastically debated how much it costs to tweet, and generally lampooned themselves for being old, out of touch rich guys. The four and a half minute clip is really funny, IMO. My favorite parts:

Spacey: "I was making a joke with a friend of mine. Calm down, you tweets!"

Dave: "You know what it reminds me of? Oh yeah, a waste of time."

Spacey tweeted live from the show on his BlackBerry. Can anyone tell, was that a Bold he was wielding on the couch?

via Crunchgear, via Huffington Post