it includes SQL Server 2005 SP3 cumulative updates 1 to 11, customer requested fixes and the SQL Server 2005 SP4 database engine support for DAC operations.
some download links
Service Pack: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=b953e84f-9307-405e-bceb-47bd345baece&displaylang=en
Feature packs: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=7768393b-71fa-4281-83eb-cab08be4fb76&displaylang=en
Read more: Lev's WebLog
some download links
Service Pack: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=b953e84f-9307-405e-bceb-47bd345baece&displaylang=en
Feature packs: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=7768393b-71fa-4281-83eb-cab08be4fb76&displaylang=en
Read more: Lev's WebLog