This list hasn’t been updated since 2009-ish, so YMMV. It’s on my list to refresh

• $cript Fanatic Shay Levy’s Blog
• .NET wonders (and alike) Efran Cobisi’s Blog
• A Taste Of PowerShell
• Active Directory Powershell Blog
• Adam’s AD Admin Adam Stone’s Blog
• beefyCode.com Jim Christopher’s Blog
• Benp’s Guide to Stuff
• Björn Österman’s Infrastructural Programming?
• blog.powershell.no Jan Egil Ring’s Blog
• BSonPoSH Brandon Shell’s Blog
• Computer Performance Guy Thomas’s Blog
• Dalle & DXter
• Development in a Blink Doug Finke’s Blog
• DevInfra-US Antoine Habert’s Blog
• Dmitry’s PowerBlog: PowerShell and beyond Dmitry Sotnikov’s Blog
• Dreaming in PowerShell Dr. Tobias Weltner’s Blog
• Exchange Exchange
• get-admin Glenn Sizemore’s Blog
• Get-PowerShell Andy Schneider’s Blog
• get-powershellblog Marco Shaw’s Blog
• Get-World | ConvertTo-PowerShell
• ghjconan’s blog Gu Huanjun’s Blog
• Hey, Scripting Guy! Blog
• Huddled Masses Joel ‘Jaykul’ Bennett’s Blog
• I Love Powershell Michael Simmons’s Blog
• Indented! Chris Dent’s Blog
• JBs Powershell Jakob Bindslet’s Blog
• Joe Pruitt – A Software Architect’s take on Networ Joe Pruitt’s Blog
• Jonathan Medd’s Blog Jonathan Medd’s Blog
• Keith Hill’s Blog Keith Hill’s Blog
• Knowledge Is Power(shell) Shane Powser’s Blog
• Lead, Follow, or Move Adam Bell’s Blog
• leedesmond’s blog Lee Desmond’s Blog
• Life of a techno-guru Trevor Sullivan’s Blog
• Live Powershell Karl Prosser’s Blog
• Media And Microcode James Brundage’s Blog
• Mike Pfeiffer’s Blog Mike Pfeiffer’s Blog
• msgoodies
• Nathan’s Musings on IT and Life Nathan Linley’s Blog
• Nick’s Unified Communications and Scripting Blog Nick Smith’s Blog
• Nivot Ink Oisin Grehan’s Blog
• out-web.net Martin Zugec’s Blog
• PauerSchell Bernd Kriszio’s Blog
• PoSH Fan
• Poshoholic Kirk Munro’s Blog
• PoshTips – PowerShell Tips and Scripting Samples
• PowerShell ? ?????? ??????? Vasily Gusev’s Blog
• PowerShell Basics Steven Murawski’s Blog
• PowerShell Downunder Shane Hoey’s Blog
• Powershell for Testers
• PowerShell In GUI Blog
• PowerShell powered Vadims Podans’s Blog
• PowerShell Pro! Jesse Hamrick’s Blog
• PowerShell Scripting Weblog Daisuke Mutaguchi’s Blog
• PowerShell Team Blog
• PowerShell with a Purpose Blog Don Jones’s Blog
• PowerShell.nu Niklas Goude’s Blog
• PowerShellers Aleksandar Nikolic’s Blog
• PowerShellStation Mike Shepard’s Blog
• Precision Computing Lee Holmes’s Blog
• PS >Blog-PowerShell | Where{$_.Blog -ge $Helpful}
• Ragnar Harper`s blog on Microsoft technology and security Ragnar Harper’s Blog
• Ravikanth Chaganti Ravikanth Chaganti’s Blog
• Richard Siddaway’s Blog Richard Siddaway’s Blog
• Rick Bielawski Rick Bielawski’s Blog
• Scripting Operations Framework Gregory Schiro’s Blog
• Sev17 Chad Miller’s Blog
• Shell Shocked Chris O’Prey’s Blog
• Sly PowerShell Robert Robelo’s Blog
• String Theory Mark Schill’s Blog
• tech, mobile, powershell, stuff Jonathan Noble’s Blog
• tech-comments
• TechProsaic Hal Rottenberg’s Blog
• The Arabian PowerShell Sherif Talaat’s Blog
• The Energized Tech Sean Kearney’s Blog
• The lonely Administrator Jeffery Hicks’s Blog
• The PowerShell Front Max Trinidad’s Blog
• The PowerShell Guy Marc van Orsouw’s Blog
• The Powershell Workbench Rob Campbell’s Blog
• Tome’s Land of IT Tome Tanasovski’s Blog
• Under the Stairs Thomas Lee’s Blog
• Unlock-PowerShell Karl Mitschke’s Blog
• Use PowerShell Steven Murawski’s Blog
• Vincius Canto’s Blog Vincius Canto’s Blog
• www.powershell-scripting.com Arnaud Petitjean’s Blog
• Xenophane’s Blog Claus Nielsen’s Blog
• Yang Li – PowerShell and System Center Yang Li’s Blog

This list is now available as an opml file for importing into your favorite blog reader.