I can see why Django is great for publishing content (it as a newspaper app, as you mentioned), but I haven't found anything compelling that puts TurboGears over Django for user contributions. Do you have any specific examples?
What I am really curious about is a few features of Rails that were just stunning and made our life so much easier when making our prototype. They were:
1.) Easy database migrations.
2.) The :AsTree and related specifiers in ActiveRecord that automatically creates utility methods for the object model (such as searching over parents/children of a record)
3.) Easy handling of session data
I haven't found any mention of these features in either Django or TurboGears and I haven't snooped enough yet to find them. If you know if they are there, and how they are done, please let me know!