i've read the full thread and, to be honest, i still don't get what you are attempting.

do you want to get a normal debian on the fr and for that purpose package everything not yet in debian (if possible patching things already there but modified by nokia)?
or do you want to continue the path of maemo, ie using the horribly crippled debian infrastructure employed by nokia, but .. yeah ... what?

sometimes it looks like you do not want to use debian but deb packages -- that's what maemo does now and does, imo, bad.

sometimes it looks like you, in fact, want to install a normal debian (using the available debian armel) and port missing parts and modifications to it, maybe rebuilding armel packages with optimizaition for the omap (what is it, armv7? v8?).

could someone, please, enlighten me?

i used debian armel for almost 2 years with the openmoko freerunner and it works well -- with a device far inferior to the n900, both in terms of available memory and speed.
clinging to "compatibility with maemo/meego" is imo the wrong way anyway -- those, who care for maemo won't switch to anything else, be it full fledged debian or debianized maemo and those who are interested in a full debian, won't hardly cling to maemo.
as long as maemo apps are available as source, it should be easy to build them for debian, too.
the only thing so far, after two weeks, i would like to see in debian, is skype. anything else is either available or has substitutes.