My view of this task is from the forum and as a new user of maemo.org component sites. Because of that and my belief that time is of the essence of anything we do in life, I'm going to post in this thread rather than in an area or site that I'm not comfortable with yet.

(Greetings Daniel. I trust you had an enjoyable May Day. )

It may be more/better to concentrate on new accounts first and then determine a way to retroactively update existing accounts. A parallel system may be needed in this case.

Regardless of what approach is taken:

It seems to me that once privacy policy, web certificates, and other potential new user roadblocks are removed, established, or maintained these policies should be posted on the new user account sign up page and new users should be advised in a separate and distinct way to set their browser cookies accordingly...

For instance a typical IE7 default policy is:

Links to information on how to set cookie handling for most browsers could also be included on that page.

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All of the above is what I suspect a typical seasoned user would tell a new user to check if that new user had problems anyway. Having that information up front would make it easier for all to reference.