Not new, but worth trying out if you like dynamically updated visualisations of what’s happening on the social web. Here are four free social gadgets from Microsoft for you to play with:
Tag Cloud – See a visual tag cloud with the time and volume of their mentions
Timeline – See related terms over a chosen period of time
Buzz – See the buzz around your chosen keyword
Comparison – compare volume of mentions of up to three keywords on Twitter
Create your own social gadgets at http://fuse.microsoft.com/project/SocialGadgets.aspx