Single user login has finally been implemented (for admins only). This is where it is possible to have the same user name on every project even if you haven't registered. Eventually being able to have the same preferences such as email address will be implemented. Now with a username like "Majorly", and having registered previously across multiple projects, this wasn't a problem to me since I now own every single instance of "Majorly" across Wikimedia. I feel sorry for other users, particularly those who usurped first names on English Wikipedia (Alison, Daniel, Riana and Sarah come to mind here) since these are names in common use elsewhere, and there will be conflicts. I hope that all these usurpation requests don't drive the stewards crazy :-) Yes, only stewards can usurp accounts that have been linked, by unlinking them. Normal bureaucrats like myself end up with an error message saying the account is reserved. I think the next big thing development-wise will be implementing stable revisions. I personally feel they are a good idea in many ways, but a bad idea in many others. I might write a post on it if and when they are implemented.