Here are some great links for SCCM 2012.
SCCM 2012 Beta Home: http://www.microsoft.com/systemcenter/en/us/configuration-manager/cm-vnext-beta.aspx
Screenshots of install: http://www.windowsnetworking.com/articles_tutorials/Introduction-Configuration-Manager-2012-Part1.html
Video demos: http://blog.coretech.dk/mbu/links-and-notes-from-moc-6451-course-ti-copenhagen-week-38/
Migration: http://technet.microsoft.com/en-us/systemcenter/gg696074