Aimee,
Sending the email after a form fill is something you can easily do. There are a couple of ways to do this, you can have an email triggered after they fill out the form that goes to their email and contains a link to the whitepaper/case study, or you can set up a redirect upon submission of the form that takes them directly to the hosted whitepaper/case study. Not sure which one would fit your needs best, but if you have any questions about doing either one or ideas on how to reuse the material, feel free to email me, donm.marketo@gmail.com.
Don