I recently discovered a really simple but revelatory Twitter tool I wanted to share with everyone in this discussion: Mentionmapp. Mentionmapp creates a mini snapshot of your immediate Twitter network, including interactive most-used hashtag links and handles of people with whom you are associated, as well as their networks and hashtags... It's a fun visual, and it's helpful & interesting to have insight into your closest Twitter relationships.

Here's the link: http://www.mentionmapp.com/

Enjoy! And please feel free to return to this thread with any other tools/suggestions to disperse to the community, we'll be sure to tweet it out!