Need a Twitter plugin that does a little more than simply display your own Tweets in the sidebar? Tweet Blender does a ton of stuff:
Tweet Blender is tag-aware and has support for multiple authors, lists, hashtags, and keywords all blended together. The plugin can show tweets from just one user or a list of users (as all other Twitter plugins do); however, it can also show tweets for a topic which you can define via Twitter hashtag or keyword. But there is more! It can also show tweets for multiple authors AND multiple lists AND multiple keywords AND multiple hashtags all blended together into a single stream.