747b0392__5_1___Postgres_OnLine_Journal__Microsoft_SQL_Server_2008
[Feature] Open Source products available for it [MySQL 5.1] Many [PostgreSQL 8.4] Few but ramping up and in PHP more than SQL Server [Microsoft SQL Server 2008] 
Few except CodePlex/.NET
Cross Compare of PostgreSQL 8.4, SQL Server 2008, MySQL 5.1 - Postgres OnLine Journal
Microsoft SQL Server 2008