As for gconf2 question, some time ago qole answered me why new version can be installed (conflict with maemo one old version), and suggested that only one solution may be "hacking" new version a way that it won't conflict with maemo side, used to work with older version. then, it could be included in, for example, CSSU, and Debian version should stop making conflicts.

As there is no sign of anyone knowledgeable enough and willing to perform such a hard task, it seems that we're "doomed" to lenny/squeeze mix, or even older pure leny. At least, for now.