Around the same time I wrote a package for Emacs that would run a webserver within emacs so that you could interact with it remotely from a mobile browser:
http://thomasburette.com/take-off/ . Since every action you can perform in emacs is just a piece of elisp code you can easily send any command to emacs. The input method on mobile however is another story.
Pretty useless in practice but it was interesting to delve into the emacs source from the elisp code down to the c text rendering part.
