MDT 2012 Update 1 version 6.1.2373.0 (Version 6.1.1 on this page) was made available for download on September 19, 2012 and adds support for System Center Configuration Manager 2012 CU1 and System Center Configuration Manager 2012 SP1 Beta. It can be identified as MDT build 6.1.2373.0 in the MDT Workbench console or in the installer program properties. This is the latest version and we recommend all users run the latest version when they can to ensure the smoothest experience during future upgrades.
I am a Microsoft MVP for System Center Configuration Manager and owner of Nackers Consulting Services, LLC. I focus primarily on System Center Configuration Manager and the Microsoft Deployment Toolkit. In addition to helping clients leverage the technologies they use, I enjoy spending a lot of time on the forums and email lists helping answer questions and just seeing what people are doing with the deployment technologies available to them. I have spoken at Microsoft Management Summit on ConfigMgr/MDT integration and I have spoken at user groups around the country. If you have any questions, please feel free to contact me, I am always willing to help.