This season's upcoming software conferences are as follows:

Affiliate Summit East 2011
New York, NY
August 21-23, 2011
http://www.affiliatesummit.com/

WordCamp
Conferences several locations
Seattle, Washington, April 16, 2011
Atlanta, Georgia, May 6-7, 2011
Orange, California, May 14, 2011
Raleigh, North Carolina, May 21-22, 2011
http://central.wordcamp.org/schedule/

ISDEF Spring 2011
Independent Software Developers Forum
Kiev, Ukraine
April 22-24, 2011
http://www.isdef.org/en/conference/

Microsoft Worldwide Partner Conference 2011
Los Angeles, California
July 10-14, 2011
http://www.digitalwpc.com/

Business of Software 2011
Boston, Massachusetts
October 24-26, 2011
http://blog.businessofsoftware.org/2011/01/business-of-s
oftware-2011-dates-announced.html

European Software Conference
London, England
November 19-20, 2011
http://www.euroconference.org/

SIC
Software Industry Conference
TBD - After 20 years the conference may not go ahead this year
http://sic.org/