EDBT/ICDT 2011, Mar 21 - 25, Uppsala, Sweden, EDBT abstract: Sep 1, 2010, EDBT paper: Sep 8, 2010. ICDT abstract: Aug 7, ICDT paper: Aug 14.
WWW 2011, Mar 28 - Apr 1, Hyderabad, India. Abstract: Oct 22, Paper: Oct 29
IEEE ICDE 2011, Apr 11 - 16, Hannover, Germany. Abstract: July 16, Paper: July 23
DASFAA 2011, Apr 22 - 25, Hong Kong. Abstract: Sep 16, Paper: Sep 23
ACM SIGMOD/PODS 2011, June 12 - 17, Athens, Greece. PODS abstract: Dec 7, PODS paper: Dec 14
VLDB, Aug 28 - Sep 3, Seattle, WA. Paper: Mar 1
DEXA: Usually last week of August in Europe. Paper deadline: usually Mar 1st week.