Collecting more information from users?

[stanleys]

We'd like to learn a bit more about our users. Is there a mod that would allow us to add additional questions to the registration form?
These questions need not be required, we just want to get a better idea of who our users are.

[Allnick]

It doesn't require a mod....

go to ACP > User Profile Fields > Add New User Profile Field.
Note: User Profile Field manager will display your present user questions.

None of these are mandatory....just optional if the user feels obliging to complete.