i think the drawterm port would be interesting, but how to deal with the mismatch between the touch and 3-button-mouse interfaces seems like a big issue. i don't yet have an iPhone or iPod Touch, but for me, drawterm would push me over for the later.
for André (or anyone with similar interests), i'd second eric's suggestion of considering the Omero client using native widgets. you could do this with either ("real") OS X or the iPhone, which makes it a bit more accessible. i'm not sure anything other than the inferno interface exists today, and it'd be a neat proof-of-concept, and a useful project using some of the existing skills you're talking about.