New teaser access permission

Hi,

I think it would be very useful to many people a new permission that adds the ability to grant teaser access for nodes which access has been forbidden.

This would be useful in situations in which you wantthe anonymous users to see the teaser of somo contents, but you want it to be registered to see full contents.

There is a module (premium: http://drupal.org/project/premium ) for doing this, but it has not ben ported to 5.x to the date.
And I think it would be clearer to include this in a unique access module.

Perhaps it would be better to develop as and optional feature which could be disabled by default to avoid confusing users with a more complicated GUI if they dosen't need that dunctionality.

What do you think?

Thanks.-