I've been trying to get ADFS 3.0 on Server 2012 R2 working with SharePoint 2013. I followed http://technet.microsoft.com/en-us/library/hh305235.aspx exactly, from start to finish, but I'm running into "invalid username/password" when I attempt to login. I've added the SAML users into SharePoint.
I haven't been able to find any documentation on it, and considering it's brand new server software, I'm not too surprised. Has anyone else had any luck with it?