MTV's Laguna Beach
MTV's popular show Laguna Beach was originally immersed by the Electric Sheep Company on a standalone virtual world, based on There technology. Due to popular demand the beach has been set up in Second Life as well.
After the L-Word this is the next major tv-shows to set up shop in Second Life. In an interview I did with Paul Verhoeven he mentioned that Second Life has a number of cost-reducing advantages, so we can probably expect more tv-sets to go virtual.
MTV's Virtual Laguna Beach: http://www.vlb.mtv.com/
The Second Life version: http://slurl.com/secondlife/Laguna%20Beach/128/128/0