http://www.ducttapemarketing.com/blog/2009/06/23/3-ways-to-deep-slice-twitter-conversations/
John has a great article here on key tools for leveraging twitter.
Key tools and take aways:
- OneRiot - @oneriot – this is essentially a bookmarking site for twitter. Users share tweets that contain URLs to web pages and this site keeps track and returns search results based on topics. This is a really great way to discover some new sites related to subjects and you can interact with the twitter shares right from the site by replying to or retweeting good stuff you find.
- Topsy - @topsy – lots of stats when you search including the a collection of authors by volume for each topic you are trending. Really like this to find people who are very active around a topic or who are your best retweeters.
- crowdeye - @crowdeye – currently a twitter only search engine it gives you results from tweets and retweets including graphs and charts.