Thanks for the reply.
I think I understand what you mean about the options being added through my.yahoo automatically. I guess just so I'm clear, there is no user preferences option like you would see when creating an iGoogle application? I guess what I was hoping to do is creating an app so that a user could enter their username in the settings (much like you could enter your ZIP for weather and have it remembered) so that I could pull in information from a user account associated with my website and display it in the application.
I would like to be able to have them enter this information once when setting up the app and then never have to touch it again, so persistance is an issue. I've made iGoogle gadgets before and the preferences are nice when you need to persist information that is custom to the user, but will be the same once they've set it.