We’ve been working on updating the reader’s guides lately (particularly those for Goblet of Fire, for some reason), and areas referenced by them. Strictly British is now a section rather than a single page, and is gradually acquiring new material. You also may have noticed that Which Wizard‘s links have been undergoing some maintenance lately (adding more links, for one thing, and a few more characters).
Incidentally, Lisa added a very nice page for wizards with no surname a while back to help anyone looking for information on wizards and witches who are mentioned in canon but not named in full; don’t forget to look there instead of on the Which Wizard A – Z pages (which are organized by surname) for people like Rita‘s photographer partner Bozo.