Second Life: What's it all about?

I'll admit it, I've started playing with Second Life the online virtual world, but I strungle to find a practical use for it, Here are some iteresting links to articles though that explore some of the possabilities, Wired Travel Guide Reuters assign reporter to virtual world IBM explore business opportunities Harvard offers courses in virtual world Brands in Second Life: Professor Henry Jenkins Second Life helps develop social skills for autistic children US Congress investigates implenting real tax for virtual world