Ron Rennick

The WP/WPMU author link from the <code>the_author_posts_link()</code> template tag on the blog will link to the author’s buddypress member profile instead of the author’s posts page.
This plugin will only affect blogs where buddypress is activated sitewide. It will function the same in either the mu-plugins folder or in the plugins folder and activated sitewide.

BP Blog Author Link

This plugin changes the blog author links on a buddypress site to link to the author's buddypress member profile.

Patrick Chia

This plugin allows you to generate a <code>gravatar favicon</code> for your blog and admin logo included Apple touch icon. Just activate the plugin, and it will add gravatars to your blog template and admin panel automatically, no setting and nothing. But you must enable your avatar(Discussion Settings). (W6A4N4-L26P6-WSH)

Gravatar Favicon

This plugin allows you to generate a gravatar favicon for your blog and admin logo included Apple touch icon.

BP Blog Author Link vs Gravatar Favicon