I registered today for a talk.maemo.org account, and it's been fine. Annoyingly, I apparently need a different account for maemo.org; and I also apparently already have one. However, I have no idea what the password for it is. And there is no "Forgot your password?" link when the password I expected to work fails.

How do I get them to send me a password reminder or reset-link or however it's done here?

Probably sends reset details/link to the emails address you registered with.

Please try the garage Lost Account Password page.

Though if you're not Mike Cowperthwaite who joined maemo.org in July of last year and made a few wiki edits, then your chosen username has already been taken by someone else.