About merging accounts, the only thing we considered, which may be in the works is helping the other wikis set up OpenID registration and log in. It's completely optional and the users could go from one wiki to the next and be signed in. Bulbapedia and its many language affiliates would benefit the most from that system.
Oh and hey I have a suggestion... think we should have a thread of Forum suggestions and another for wiki suggestions? (just thinking out loud)