Windows Administration in Realtime
The August issue of WAR is available from http://nexus.realtimepublishers.com/RTWA.htm. if you haven't seen it before it is a free download. This month it contains an article on using PowerShell with snapshot backups in Windows 2008 and the Practical PowerShell column on backing up event logs.
There is good practical PowerShell coverage in at least one article every month. Well worth a read. Especially at the price!