Option to only display new blogs that have atleast 1 post.

I would love to see there be an option for when new blogs are displayed on your homepage that only the blogs with atleast 1 post are displayed. This way you do not end up with a bunch of new blogs using the default avatar and only the welcome message on your homepage.

What do you all think of this idea? I think it could help to make our WPMU sites seem a lot more active and not have so many dead blogs linked to our home page.