I've tried to skim through the many posts of these threads looking for problems of user friendliness of talk.maemo.org would rely.

Am I missing something or single sign-on is the only measurable problem beyond human psychology reported here?

If so, there two tasks committed to the maemo.org October sprint:

9.10-03 Implement SSO backend Must indeyets 0%
9.09-10 Implement SSO sync-API endpoint for garage Could danielwilms 0%

No talk.maemo.org login integration in this sprint. If you want to help on this then you can offer your hand directly to the people in the works, or at least you can help creating/improving/promoting a wiki page explaining the status of logins in maemo.org that could be e.g. http://wiki.maemo.org/Task:Single_sign-on