I have recently read two manuscripts from Manning: SOA patterns by Rotem et all and PowerShell and WMI by Siddaway. None of them are published yet, but both are available through Mannings MEA program.
Like I have done previously I will try to write up a small review of each, but right now I do not have the bandwidth, so it will have to wait a little.
I can say that I found both books interesting. Howerver, PowerShell and WMI is not the most exciting subject, so this was somewhat difficult to get through. A lot of very good and usefull examples, though, which helped a lot.