Dear Guillermo,
Views doesnt query users yet, only posts and taxonomies. You need to create your own template to list the users and use the following to display the extra fields:
http://codex.wordpress.org/Function_Reference/get_users
http://wp-types.com/documentation/user-guides/displaying-wordpress-user-fields/
Please let me know if you are satisfied with my answer and if I can help you with any other questions you might have.
Regards,
Caridad
