Yes. Ideally you'll overwrite the setup view with your own. An easier method to adjust what is done on user creation is to pass a custom form into the setup view. You'll do that by overriding the standard url.

Ok, thank you.

@flashingpumpkin, can you give any more details on your "pass a custom form" solution? I have the same problem as @Tolano. When a new user is created on my site, I would like to create a related UserProfile record (my AUTH_PROFILE_MODULE) which includes their Facebook information. Thanks.

a little more detail in my Stack Overflow answer here: http://stackoverflow.com/questions/3981375/error-when-wrapping-the-view-of-a-3rd-party-django-app-facebook-django-socialr

Mitchf's answer is spot on.