At Fri, 29 Jul 2005 21:47:47 GMT,
Forrest Chang wrote:
> >   run ri inside emacs 
> 
>     you could do a shell command, but I would guess there's a cool
> feature.  SImilarly, you can do man from emacs, so I suspect there is
> a similar elisp feature to allow easy ri from emacs
>

Have a look at ri-emacs:
http://rubyforge.org/projects/ri-emacs/
It works best on XEmacs, but should work fine on Emacs.

Kristof