Once MySQL is down, they will start flipping around with other Sun's software. The most worry are the neutrality of those software. I can see that they will do whatever changes to best fit them for Oracle software only, and no JAVA for anyone anymore... :(

PostgreSQL, Oracle & DB2 are all serious DBs optimized for heavy load on multi-CPU systems.

MySQL & MS-SQL are mis-optimized for single CPU systems with light loads. They get so much attention from websites because people often pick them because they have allot of beginner guides & GUI tools for them. Most sites never become popular enough to need a serious DB system but why go down the wrong road when you don't have to?

I highly doubt that any large corporation that was given the keys to their biggest competitor would act in any interest besides their own. Anything done for MySQL would be seen as having a negative impact on their own software.

I was pretty hopeful that if Oracle got MySQL they would make the changes required to make MySQL and their own databases compatible so customers wanting to upgrade from MySQL to an enterprise class database could do so without alot of work.

For what it's worth, I think if you're running a small database on windows SQL Server 2005-2008 express editions are easier to use and maintain, and if you need cross platform or don't like the licensing then postgres really does work fine in windows and linux and has database drivers for the popular programming languages and frameworks.