Well I'm pretty sure if the N900 community was able to polish up Maemo5 (user interface etc etc) and Nokia agreed to open-source those closed sectors (mostly drivers, camera stack etc) ... then there may have been some interest.

It would've been sick if things played out like that and we saw (for instance) a polished Maemo5 on the EPIC 4G/Milestone2 or any other cool phone!