It's not that this isn't useful, but rather that there's an old (but fully functional) way to run Speedbar in the current frame, called sr-speedbar, available a

It's not that this isn't useful, but rather that there's an old (but fully functional) way to run Speedbar in the current frame, called sr-speedbar, available at http://www.emacswiki.org/emacs/SrSpeedbar http://www.emacswiki.org/emacs/SrSpeedbar. I'm not clear what benefit Nav provides that sr-speedbar doesn't (and I know plenty in the reverse, since Speedbar's used by a number of IDE packages for things that have nothing to do with directories. (E.g., CEDET can use it to show the class hierarchy.)