fwiw:
I'd be willing to pay for updates and improvements that would keep the Maemo base system up to date i.e. compatible to Debian Stable. That would primarily include security patches and package version updates (e.g. pulseaudio on the N900 is already heavily outdated - see the Easy Debian pulseaudio problem; the kernel will need an update sooner or later - I know that's a big one, especially with all those proprietary blobs in the system) and secondarily trying to replace proprietary components with free software alternatives of at least equal functionality.