Yeah, realistically, just get people onto a server (we can bike shed about which is best for that later) and then when they learn more about what they are/imply and what different ones are like they can move if they want to. I'm sure I'm preaching the choir here, but everything can be pretty easily migrated to your new account. The only thing that won't be is your old posts/comments and replies to those won't end up in your new inbox, but that's pretty minor.