msdnman
I happened upon this post from Craig Andera announcing a handly utility - msdnman. Like man pages in *nix? Check out msdnman. Download it from CodePlex
Here's the blurb from the project home page:
msdnman is a command-line viewer for documentation stored in the
MSDN/TechNet Publishing System (MTPS). It uses the MTPS Content Web Service
to retrieve documentation and renders it to the console. It also includes
support for searching all MSDN content from the command line.
Sweet.