AON is an online convention membership system. You can create a single AON membership that allows you to signup not just for one convention, but to any number of participating conventions.
Registering for a particular convention is one of the things you can do as an AON member. See convention help.
Its still fairly simple - you have to create an AON membership, but once you've put in your details, you can choose the convention you're interested in and sign on up. Next year, your membership will still exist, and you can sign up for that convention too.
You don't have to make an AON membership for each of them - you can make one membership and register multiple people through a single membership.
To start off, you need to choose a username and then enter your email address and a password. You need to accept a single cookie to login. A username can only contain numbers or letters, and must be 2+ characters long.
Sorry, we can't do anything about that - first in, best dressed.
You can get a new password sent to yourself as long as you remember your username - we'll mail it out to the address in your membership.
No, we don't store your password in a way that lets us do that.
If you don't do anything in AON for 2 hours, it will log you out.