The official answer is "no" because it's still in beta and objectives, etc could change. But realisticly, in my experience, when new products come out Microsoft has really funny test questions. Its like they were all based on the marketing materials, and not really full of the wide range of technology a seasoned exam is.
Having said that, I would check out these links...
SBS Blog (SBS2k8 shown)
http://blogs.technet.com/sbs/archive/tags/Windows+Small+Business+Server+2008/default.aspxSBS 2k8 on technet (not many articles yet, probably feasable to read them all)
http://technet.microsoft.com/en-us/library/cc527559.aspxMain page:
http://www.microsoft.com/windowsserver/essential/sbs/default.mspxI'd pay special attention to the new migration paths, and differences between products, now that there are effectivly 4 versions...
oh, and of course the official exam page, with objectives, etc...
http://www.microsoft.com/learning/en/us/Exams/70-653.aspx
Mike Crowley: MCT, MCSE, MCTS, MCITP: Enterprise Messaging Administrator
