I found these blogs are very useful to know about MSDTC(I just want save you some time,adding all the blog links here)

http://blogs.msdn.com/florinlazar/
http://pluralsight.com/blogs/jimjohn/default.aspx

 http://blogs.msdn.com/esperpento/

 http://blogs.msdn.com/miguel/


http://pluralsight.com/wiki/default.aspx/Don.TransactionAsks