So far there is just one mailing list, zoolib-dev, but I will be adding zoolib-announce as soon as I can be sure I know how to create a one-way mailing list.
At least in the beginning, we'll have just one mailing list for developers who are developing ZooLib itself and for those who are just using it as a platform for their applications. Perhaps someday there will be enough traffic and interests will be specialized enough that we'll need a zoolib-dev-users mailing list too.