I have a site license of Win 2K Server / SQL 2000 Enterprise -- not sure how it would work, perhaps I could set up some DB space or something if you were really interested in doing it.

However the LARGEST strength of Postgres, SQL Server, Sybase, Oracle, etc. is that they support MANY more features than MySQL, namely stored procedures, triggers, etc. -- and to REALLY make a port it's not just swapping out the DB class for a new one (that and INSERTS are different, etc. through vendors) -- it's re-writing the queries to take advantage of subqueries, stored procedures, triggers, etc.

The abstraction class in vB is nice, but there are no easy ways to do a 1-for-1 swap of db.php and expect it to work.