<p>I have noticed that GhostDoc hasn't been updated in a long while.  So I am curious if there is a plug-in for Resharper or CodeRush that will accomplish the same thing?  Or even if this type of functionality is built in to one of the tools that would be great too.  </p>

GhostDoc is working just fine, so I guess there is no need to be updated (unless some new features will be added). Also, it does not conflict with Resharper in any way (for me, at least).
Edit:
Since everybody seems to happily use GhostDoc (based on my Google search), I doubt anyone will reinvent the wheel, unless it suffers from the not-invented-here sindrom.
EDIT
Well, a new version was released:
SubMain acquires GhostDoc, releases new version, integrates it with CodeIt.Right