The maemo.org infra is old and in low maintenance mode.
I doubt you can setup a working account for garage now. I also doubt garage will stay up, it seems to fall over after a few weeks.

It a bit complex to explain the full situation with accounts, people that have been around for a long time will understand this better.

talk.maemo.org is separate from most of the other stuff, this historically goes back to it being internet-tablet-talk aka (ITT).

What information do you want from garage?