I am a PhD student at the University of Chicago (more details in my UofC page). I've lectured several intro programming courses in the past, and I am currently TAing a databases course.
I have a collection of SQL exercises written over a number of years that I want to publish as a Wikibook. I started writing the SQL Exercises Wikibook on 03/15/08, and I hope it will include a useful amount of exercises by late April or late May.
I have used Wikipedia for ages now, but I am fairly new to Wikibooks. If I make any Wikibooks faux-pas, please don't hesitate to point it out :-)