The MonetDB team at CWI/MonetDB BV is pleased to announce the May21009-SP1 bug fix release of the MonetDB suite of programs. This is a bug fix release for last month's May2009 release. More information on this release can be found at <http://monetdb.cwi.nl/projects/monetdb/Development/Releases/May2009/#May2009_SP1>. The sources and binaries are available at <http://monetdb.cwi.nl/projects/monetdb/Download/>. -- Sjoerd Mullender