The WMF has contracted the San Francisco user experience research firm, Bolt Peters (not an image I want in my head), to find out how people who don't edit Wikipedia behave when they start editing Wikipedia.
There is a set of videos you can watch. (Rather painful for people who do respondent-based research for a living.)
The funniest thing I found, though, were the block logs on the accounts that they used during this research. (I'll bet that this data doesn't make it to the Executive Summary.)
Usability Tester 2
Usability Tester 3
Usability Tester 4
You get the picture. NawlinWiki doing his/her part to maintain an environment of robotic unwelcome at Wikipedia!
Greg