'Settings' should link to http://www.zotero.org/settings/profile
The Profile Settings are more important/more high traffic than the Account Settings. So clicking on 'Settings' should bring one to http://www.zotero.org/settings/profile in one go (right now this requires another click on the 'Profile' tab).
mark, however, does have a link to his profile there. (cf. alexuw or tjowens) Howdyadoodat??
Combining profiles is on the list of things to do but fairly low priority. Simply adding a link from the forum profile to the zotero profile should probably be done in the meantime.
Anyone who wants to do this, note this is your forum settings not your zotero profile settings. From any forum page click "Account" under Quick Links. Then "Personal Information" and you can enter name-value pairs.