The Telegraph reports Justin Knapp, 30, from Indianapolis, has made an amazing 1 million contributions to Wikipedia since signing up in March 2005. This means he has edited Wikipedia at a rate of 385 edits per day, or just over one every four minutes. Full details over here.
Wikipedia, whose editors work on a voluntary basis, removed the option allowing anyone to edit an entry in 2007 after a series of unreliable updates.
Knapp, who has degrees in philosophy and political science from Indiana University, posted on his page: "Being suddenly and involuntarily unemployed will do that to you."
His edits have mostly been about politics, philosophy, religion and popular culture. The user with the second most edits is Rich Farmbrough, from the UK.