[Dead Corpse]

Long-term ROI can't be beat. I've been using Linux variants for about ten years now. Mostly desktop, some in hardware/platform testing. Recently for LAMP implementations and server side open source apps.

How much of the Intarwebs run on Apache? How different is MySql or PostgreSQL from MS SQL?

[MarkeyD]

How different is MySql or PostgreSQL from MS SQL?

Depending on how extensively you use them, pretty different. It's not just the data storage, it's the syntax for views, stored procedures, triggers, user defined functions (if supported). Lots of work required for the migration. Then there is the driver issue, not all are fully implemented. Been there, done that.