Here is a list of useful Windows Operating System, MDT, ConfigMgr, and other OS Deployment resources...
Deployvista (My old Blog :) ) - Despite the name, dedicated to all types of operating system deployments
Mike's (aka Deploymentbunny) blog - Mikael Nystroms blog
ConfigMgrFTW - Jason Sandys Blog
Deployment Guys blog - A handful of deployment experts (MCS) are blogging here
Microsoft Deployment Toolkit Team Blog - The MDT team blog
Michael Niehaus blog - Nicknamed "Knowledgehaus" internally for his massive knowledge on deployment.
Xtreme Consulting blog - A few of the contractors on the MDT team work for Xtreme, this is their blog
Chris Nackers blog - Deployment Expert, working for Catapult Systems
Josh Mueller blog - Fellow deployment geek...
Maik Koster blog - Deployment Expert, Author, and Developer
MSNLoop - French deployment site (in French) hosted by Yannick Plavonil.
ConfigMgrBlog.com - Peter Daalmans blog