Second Life, a virtual world owned by Linden Labs just celebrated its tenth birthday. It was one of the first virtual worlds that decided to let the consumer produce everything in it.
Linden Labs released this for their 10 year anniversary infographic. Some basic numbers are:
36 Million Accounts
$3.2 Billion USD virtual goods
more than 1 Million visitors monthly
Second Life is one of the options that educators have for creating immersive environments. One advantage that Second Life had over other environments is a strong support group of educators. While educators have gone to other virtual worlds like OpenSim, Unity and Cloud Party, a number of educators groups do meet regularly in Second Life.