After working on a few projects, Maya 2014 wouldn't open. As soon as the program opened, it gave me a fatal error and would close. Instead of trying to find a workaround, I uninstalled it and deleted any Autodesk/Maya2012,2013,2014 folders on my computer.
With the re-install, it's working great; however, mental ray will not install. Here's a screenshot of the installation page.
Edit: since this has been mentioned on other threads, mayatomr.mll isn't in the plug-in manager.

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When the Autodesk_Maya_2014_dlm.sfx.exe download is opened, it extracts all installation files to C:\Autodesk\. In that folder, navigate to C:\Autodesk\Autodesk_Maya_2014_dlm\x64\MentalRayPlugIn. There should be a MentalRayPlugIn2014.msi file located there as well as any other files needed to install Mental Ray.