An apparent data center outage has put Wikipedia, the crowd-sourced encyclopedia, under for about two hours now. Visiting the site gives a user an error message, "Meta has a problem. Sorry! This site is experiencing technical difficulties." Steven Walling, a Wikipedia volunteer (and former ReadWriteWeb reporter), explains in a comment on NextWeb. Sponsor "What happened with the last outage was that a heating issue killed one of the two datacenters (the one in Amsterdam), and the increased pressure from handling all the traffic eventually brought down the servers in Florida too.