I'd like to see a way to customize the registration form so that a person is able to select a separate user group during registration. I'd like to have the user be able to select to be added to either registered, author, editor or publisher. It would be nice to have a drop-down menu and a way for the user to select from these account types and then after they have finished the registration, they are automatically added to the correct group.

Or, better yet, have a way to automatically assign users to a user group based on a conditional drop-down box. So if they select Personal account, they'd be added to registered users. And if they select Professional account, they'd be added to the author group. Perhaps there could be an option for whether the registering user is able to select their user group or if it would automatically assigned. That would be ideal.

yeah, but could you help with creating such a plugin?

My Advanced Profile Control plugin will do this. You can buy soon from my site.

mikko