Pigi

Using this small plugin you’ll be able to deliver content Around the web.
You can choose what Social Network website include in your post; what layout use to this plugin between:
<ul>
<li>Horizontal (default)</li>
<li>Vertical</li>
</ul>
Supported Website:
<ul>
<li>Facebook</li>
<li>Twitter</li>
<li>Friendfeed</li>
<li>StumbleUpon</li>
<li>Feed RSS DELIVERY</li>
<li>Digg</li>
<li>Google Buzz</li>
<li>Yahoo Buzz</li>
</ul>

Social Network Sharer

Using this small plugin you'll be able to deliver content Around the web.

dalziel

This plugin will take the comments & ‘likes’ on your posts from FriendFeed and place them on the post that they’re related to. The comments come with the person’s name, a link to their FriendFeed profile & their FriendFeed image. 
Your blog’s readers can also comment on & like your posts directly from a form displayed under the FriendFeed comments (this is an option that can be turned off)

FriendFeed Comments

Puts the comments and likes from FriendFeed on your posts.

Social Network Sharer vs FriendFeed Comments