Welll... As lovely it would be, it would mean producing entire new set of parts (display, chassis, covers, main board, etc.), even if the core tech stays the same, it would mean extra costs. And remember we are talking about the company that refuses to make operator specific variants of their phones, arguing that that would lower their production efficiency too much.

There is no way they'd release a bigger iteration just for the relatively small hacker community, especially as most of us will buy the N900 anyway if no better maemo alternative shows up for a while