New Plugins
WordPress Timeago
Twitter, Facebook, Gmail, and all the big guns are using the fuzzy date/time of type “3 minutes ago”, “10 days ago” etc. Timeago plugin allows you to use the same format on your WordPress blogs.
Twitter Avatar Reloaded
Twitter avatar reloaded Plugin adds a new field to the comment form to get the user’s Twitter

More at: http://weblogtoolscollection.com/archives/2010/03/20/wordpress-plugin-releases-for-0320/