A quick update - the Info-Mac archive site at <sumex-aim.stanford.edu> is back up and running, although you should still try to use mirror sites whenever possible.
Hide TextExpander in the Dock
If you don't want to see TextExpander's icon in the Dock and the application switcher, you can remove it. Just open TextExpander > Preferences > Appearance, and select Hide TextExpander Icon in Dock. You'll still be able to access TextExpander from its menubar icon.