With Sun's recent purchase of MySQL, is it to one's best interest to move to one of the other leaders of open source databases? It could be too early to tell. With so many people dependent on MySQL its hard to believe anything will change, after all Java still is a pretty cheap commodity. I have already begun exploring other options, not saying I would abandon them but I've always had a good feeling about Postgres, and now might be a time to give it a spin. I've also used SQLite recently and that is a nice portable solution for light weight tasks(especially if you will be developing on one server and moving to another server). As of now I am keeping my eyes open but being a curious mind I am always trying new things. Only time will tell!