I have liked what Content Access does, providing role and/or user level access to both content types and individual nodes:
http://drupal.org/project/content_access
JT
Aldo Martinez Selleras wrote:
there some module for limit the access to a content type bye users, don't for roles?
ex.
user1 user50 user30
can do anything with the content type "my_own_type"
the others user can do nothing with this content type, not even view the posts!