Location: Toronto, Canada
Date: July 20-23, 2008
Submission deadline: March 5, 2008 (midnight by any time zone)
Link

Location: Athens, Greece
Date: June 28th - July 3rd, 2008
Link
Abstract submission deadline: February 28,2008

Location: Toronto, Canada
Date: July 19-23
Link

Location: Boston/Cambridge, MA, USA
Date: March 5-7, 2008
Link