Powershell Blogs at Microsoft

The Very Heart of Powershell - The designers themselves. You will see (and see response from the very people involved in it's support and creation here. And Trust me. I can vouch that THEY DO READ the comments and take them to heart!)

http://blogs.msdn.com/powershell/

Powershell Community

The Central Hub for Anything Powershell related
http://www.powershellcommunity.org/

Powerscripting Podcast

Weekly Podcast show Hosted by Jonathon Walz and Hal Rottenberg. Interviews with the "Who's Who" in Powershell. Also a live Video Show every Tuesday

http://www.powersscripting.nety.org/

Bare Metal Powershell - Oisin Grehan - Microsoft MVP

A Developer that goes Deep Dive into Powershell and rocks on with it.

http://www.nivot.org/
Quest Software and Powershell

Free Utilities that add in to Powershell. Allow you to manipulate Active Directory and TRULY feel the POWER that is Powershell

http://www.quest.com/powershell/

Idera and Powershell

Software that allows you to get pumped up and work with Powershell to the next level. Powershell PLUS!

http://www.idera.com/Products/PowerShell/

Energized About Technology

My own Personal Blog. A little of this, a little of that. A lot of Powershell Love

http://ye110beard.spaces.live.com