If you're returning to Cyburbia, your old password should still work with your username. If you can't remember your password, you can reset it here. If your email changed, or you can't get into your account, follow these instructions.
Of course, it doesn't hurt to check the web sites of cities that you want to consider. In addition, you might look at city and county associations, public administration, and community or economic development organizations. Here are a few I've bookmarked, which are not on Cyburbia (yet?).