Reuters/Second Life » Second Life tops 50,000 concurrency:
"As first reported in the Second Life Insider, over 50,000 avatars were online in the virtual world simultaneously for the first time yesterday. Usage peaked at a concurrency of 50,528 at 1:45pm Second Life Time (US Pacific) before beginning to fall. Catherine Smith, a spokeswoman for Linden Lab, confirmed the new record."Whoo! It's not that long since I remember thinking that the architecture of Second Life would be lucky to manage 20,000 at the same time. Evidently the new messaging architecture which the Lab introduced in August has done some good.