Hi Simeon.
It’s not very hard. Right after login, the person will be taken to the Login Welcome page. [hilite path]Dashboard -› s2Member® -› General Options -› Login Welcome Page[/hilite].
In that page, you can have conditionals that checks the status of the user, and based on that can be redirected with JavaScript.
[hilite path]Dashboard -› s2Member® -› API / Scripting -› Simple/Shortcode Conditionals[/hilite]
[hilite path]Dashboard -› s2Member® -› API / Scripting -› Advanced PHP Conditionals[/hilite]
A bit faster redirection could be done with a hack in the must-use plugins directory, probably using the wp-loaded hook.
I hope that helps. :)