hehe the "mysql isnt a real database" posts are amusing. MySQL 5.0 support would be nice though (3.00.26 apharently has it but its not stable yet).
MySQL scales very well. SQL2000 only has an advantage when your dealing with tables that take up gigs of space. (I cant imagine a kayako database with gigs of tickets... seriously who has a million tickets?)
I agree with craig though.. abstraction would be nice. If only for the fact that if a shop already has standardized in a particular database platform, its easier to write a driver for their particular setup than deploy a dedicated database specifically for kayako. In my case I had to deploy a 4.x MySQL specifically for kayako (since the only accessible mysql databases running on my network are 5.0).
A database platform is only as good as the DBA. a good dba and mysql is enterprise.
