Maybe this has been possible for some time, but I finally got the combination of ReSharper, DXCore and GhostDoc to co-exist peacefully on my Vista machine.  I'm using:

• Resharper 3.0.2
• DXCore 2.5.10
• GhostDoc 2.1.2

Why is this important: it enables me to use CR_Documentor, giving a very nice almost real-time preview of XML comments in a tool window.  This is important for XML comment fetishists like me.