Avatar plugin suggestion

I really think that the avatar plugin should be changed so that there is one avatar/user. 99,9999999999% of all registered users have 1 blog and 1 author on that blog.

I understand that there may be a conflict if a blog has several authors but why not just make bloglisting etc use the most active authors avatar or the original authors (the one who registered the blog) avatar. And with postlisting etc use the author of the posts avatar.