I've just finished reading Funambol Mobile Open Source by Stefano Fornari. I already knew a good deal about Funambol servers and setup prior to reading this book, but I have to say this book would definitely have made my own learning curve a lot easier.
The author does a good job of providing both a beginners perspective and touching lightly on some advanced topics. It begins by chronicling the installation and setup of a fictional user "Maria" as she goes from simply syncing her local desktop to a newly installed Funambol server to a full fledged enterprise environment with hundreds of users.
It covers both Windows and Linux installations and several mobile devices as well including both the Blackberry and the iPhone. It doesn't go into great detail on any one mobile device. I would have preferred to see a bit more detail regarding both the Blackberry and the iPhone considering their prevalence in the market, but he does a good job of at least getting you started with both.

I'm in the process of reading two new books and will be posting reviews on them in a few days. The first is