747b0392__5_1___Postgres_OnLine_Journal__Microsoft_SQL_Server_2008
[Feature] Commercial [MySQL 5.1] Moderate [PostgreSQL 8.4] Moderate -- I think PostgreSQL has improved since last we checked, but probably still lower than MySQL penetration. [Microsoft SQL Server 2008] 
Moderate -- still a lot of commercial stuff hasn't been certified on 2008 because 2008 is so new
Cross Compare of PostgreSQL 8.4, SQL Server 2008, MySQL 5.1 - Postgres OnLine Journal
Microsoft SQL Server 2008