The Tonight With Vincent Browne tv show (& it's sister show on Friday night) is a perfect vehicle for the social media site twitter.com (search #VinB)
The twitter chat about the show reached it's zenith last Friday night with the Jedward appearance on the show. The show was itself was highly entertaining Friday night crack which was raised another notch by the twitter chat during it.
It's very hard describing the appeal of twitter to people who don't use it. It's a bit like trying to describe the taste of water.
But try this: The next time you watch a popular favourite tv show, go onto twitter.com and search for live comments about the show. It should give you the flavour.