The good news is, it's not a Wikitravel problem. The bad news is there's a critical bug in the latest OpenID release for Drupal. I'm trying some work-around and will also look into rolling back to an old version, but it might be a day or two (unless there's a patch or new release posted).

My suggestion is to create a new user account the old fashion way. You can then associate your OpenID to that account.

Again, sorry about this!