Well, if it is possible to get the installer from the nit-debian project going on a n770 i see no reason why it shouldn't be able to benefit from it. I guess it just requires people testing out and contributing 770-specific hacks/packages for things. If you have a 770 and want to contribute, look at the Continuing development of Debian on NITs thread or come on #maemo on FreeNode and talk to some of us to see if we can make it start up decently on 770 too.