MySQL closed-source: What's the alternative?

An anonymous writer posted on Slashdot that Sun Microsystem has announced that parts of MySQL will be closed-sourced, e.g. backup solutions and some more advanced features. The post is refering to Jeremy Cole's blog entry on the subject. The decision is certainly Sun Microsystem's business, and I'm sure it makes a lot of sense from their executive view. However, the users have an opportunity to help Sun Microsystem's understand the consequences of their decision. For instance, if you want to continue using an open-source database, PostgreSQL might be an alternative worth looking at. Developing for the Microsoft platform, it offers native interfaces for C, C++, and .NET, and even the "good old" (?) ODBC is available.