Factory factories USED to be a problem in my Java programming, but they aren't anymore because I created a configurable builder class for generating my factory factories. I call it FactoryFactoryBuilder, and it completely eliminated the factory factory problem.

That sounds like a great idea. I bet you could even use some XML configuration files to make it even more extensible.

I haven't actually seen a Factory Factory in a while. I think Dependency Injection has pretty much killed that anti-pattern.