So, how about looking through the style system and making sure that there is a mobile-optimized version of every style element, and letting people build their own mobile styles, to suit their own fancy and their own device? You could then have styles optimized for every device in a pick-your-style place, then hit up username.dreamwidth.org/m for your own pet implementation, and you could tweak to suit.

The main m.dreamwidth.org would have a likely-to-be-usable-by-all version. Unless it's practical to have many people hitting up m.dw.org and imposing their own styles on it, in which case we could do without the user.dw.org/m thing.