Olando7 Decosta of MixedRealities has a very nice summary of highlights from my appearance in Metaplace yesterday, with topics ranging all over the virtual worlds landscape. Here's one specifically related to SL:
“The lack of badges and awards has hurt SL’s growth rate in my opinion. There’s no recognition and incentive for staying in-world other than the social networks you form in there and content creation, which many people can’t do well. You don’t need big invasive leveling systems like WoW, but how about awards for number of sims visited?”
Who else wants a grid-driven achievement system in SL, which in my opinion, is a major contributor to the high retention rates of the largest virtual worlds? In any case, read more here.