Is there a Database Control Panel in Plesk ?

“Plesk Power Pack” is the add-on that allows you to manage various databases. MSSql Databases, MySQL Databases, PostgreSQL Databases are supported and manageable through Plesk Power Pack.

Windows 2003 Standard Edition vs Windows 2003 Enterprise Edition - what to choose?
Windows Standard Edition supports up to 4 GB of RAM, which is not enough for web servers having many Application Pools. If you are offering top notch services (like a separate app pool for each site) and charging accordingly, then by all means go for Windows Enterprise Edition.