Accessing EnvDte from a plugin

Asked same question in OpenAPI forum, but it seems to be pretty dead over there.

I am simply looking for a way to access the Visual Studio (2010) DTE object model from within my ReSharper plugin code.  There were some threads a few years ago saying to use VSShell.Instance, but that way of doing things seems to have disappeared (or I can't find it, at least) in the current system.  So, anyone know of a way to achieve this?

What I really want to do is be able to pipe the output from an external console program to the VS output window, so I am also open to any suggestions on how to do this that does not involve DTE.  Thanks!