All invited participants are encouraged to submit titles and abstracts to be included in the conference brochure (deadline April 5th) and, for those who have not already done so, please forward a copy to Steven Lu (lu@math.uqam.ca). This should be useful for interaction even if one does not give a talk at the workshop and we may have a proceedings in the AMS series "CRM Proceedings and Lecture Notes" as a result of the workshop.