Over on English Wikinews we're looking at minimising the attack surface from abandoned/unused accounts with elevated privileges.
So many websites nowadays have 'gadgets' that give people a clue as-to how strong their password is. I'd love to see MediaWiki include similar, especially for accounts such as admins and bureaucrats. This entropy calculator would be an idea addition. I take it for granted MediaWiki devs are paranoid about their own passwords, use of something like this might help instill a degree of security-consciousness into the user base.