Microsoft Official Courses (MOC) provide job-relevant, technically accurate Microsoft instruction. Each classroom training course lasts three to five days and includes the planning, design, implementation, management, and support phases of the technology adoption lifecycle.
As a Microsoft Certified Trainer, I personally recommend Train Signal for its exceptional scenario based hands-on approach to help you master real world skills that directly transfer from their videos to your workplace.
Jan Egil Ring's PowerShell Blog
http://blog.powershell.no
Springboard Series
Born To Learn
Iftekhar Hussain's Blog on Virtualization
Virtually Yours
Don Jone's Blog on PowerShell
ShellHub
Richard Siddaway's Blog on PowerShell
Of PowerShell and Other Things
Partner Techincal Services Blog
PTS Blog
Windows Guru, William Stanek's Home Page
William Stanek
Thomas Lee's Blog on PowerShell, Lync, UC
Under The Stairs
Microsoft Exchange Server 2010 Best Practices
This is provided ‘AS IS’ with no warranties, and confers no rights. Use of included samples are subject to the terms specified at Microsoft