We've now published the Team Explorer Everywhere documentation online on MSDN.  This will make it easier to find and search as it will be indexed by your favorite search engines :)

You'll find the docs for the Eclipse plug-in here: http://msdn.microsoft.com/en-us/library/gg413285.aspx

And the docs for the cross platform command line here: http://msdn.microsoft.com/en-us/library/gg413282.aspx