OK, so what I'm trying to do is add a phone field to the user registration. I've added the field in the registration box, and I want to use update_usermeta to add the phone to the usermeta table. I've been trying to use the user_register actions to put this in. The problem is that I can't get the ID since the user has just registered and isn't logged in. I'm just wondering if there it's possible to get that ID at this point.