I passed the 70-410.
I got a * mumbles something about a 77something* but who cares, I passed!
This is the third microsoft exam I have taken this year, after the 70-680 and the 70-686. The 70-410 was the easiest.
What I used to study.
Train signal. I watched and labbed the lessons on 70-410, but I also watched another series on Hyper-V and the Network+ portions concerning IPv6.
I read a lot of Technet, using 
Asif Dasl's thread as a guide.
I also read from chapters of MCTS 70-642 Cert Guide: Windows Server 2008 Network Infrastructure, Configuring by Don Poultron. I was having trouble with some of the theories on DNS and wanted some further reading material. THe basic concepts are the same.
Finally, I am readying Learning Powershell 3.0 In A Month of Lunches by Don Jones and Jeffrey Hicks. This is not specific to Server 2012, but there were a lot of question like, "The security policy tells you that you have to do X.  How do you do that with powershell?"  With knowing the basic syntax and grammar of Powershell those questions were not that hard.
Good luck to anybody planning on taking it.
One down, two to go.