Hi,
I fear that there is not much preparationmaterial available. The exam homepage at
http://www.microsoft.com/learning/en/us/exam.aspx?ID=70-178&locale=en-us#tab2 does not give any preparation materials so far.
So the only idea I have is to go through the list "Skills measured" and use bing or google to find as much documentation as possible about the topic and to try to play around a alot to get skills on all topics given there.
Good luck with that exam.
With kind regards,
Konrad