Well, it started out as a comment in which I was going to muse that there may be value in writing a keymapping for ASCII-art-to-Unicode-pseudographics, but then I remembered all the stuff I've been learning about how hard keymappings are for Indic scripts and I just gave up.

BUT, if the CJK community can do it for handheld-sized devices, there's hope for moving beyond ASCII in the graphics-typing realm, too!