On Wed, Dec 24, 2008 at 1:50 PM, Stuart Geiger sgeiger@gmail.com wrote:
It may come from http://stats.wikimedia.org/EN/TablesWikipediaEN.htm - which is from 2006 and only for the English Wikipedia. According to that site, there are slightly over 150,000 registered contributors who have made at least ten edits on en.wp. That number jumps to about 300,000 when all languages are included (http://stats.wikimedia.org/EN/TablesWikipediaZZ.htm), but again, that is from late 2006.
Stuart Geiger
For English Wikipedia, we have more recent stats: [[Wikipedia:Editing frequency]], which is basically an update of the active userbase through late 2008.
I've written a bit about this. See: http://en.wikipedia.org/wiki/User:Ragesoss/Editing_frequency_stats and http://ragesossscholar.blogspot.com/2008/12/wikipedia-blogging-outside-wiki-...
-Sage (User:Ragesoss)