May 23-25, 2010; conference website here. From the website:

The first St. Louis Annual Conference on Reasons and Rationality (SLACRR, pronounced (slăk΄ r)) will take place May 23-25, 2010 at the University of Missouri-St. Louis. The conference is designed to provide a forum for new work on practical and theoretical reason, broadly construed. Please submit an abstract of 500-1000 words by December 31, 2009 to SLACRR@gmail.com. (In writing your abstract, please bear in mind that full papers should be suitable for a 30 minute presentation.) We are also interested in finding commentators for papers, so please let us know if you would have an interest in commenting.