My company has a whole Island on Second Life, full with pavilion with plasma tv's, a beach, skiing mountain, jet skies, whatever you want, and pretty successful overall. I think at first we had a lot of people show up there and now even have regulars who do stuff there. However mostly it's to have a "presence" there, kind of like after playing Grand Theft Auto you want to drink Mountain Dew, wear One-Stars and drive a VW, same way companies are filling in Second Life with their advertising not to be behind others. There is definitely some value in that, just hard to quantify.
Свободу попугаям!