Here’s an update to my post earlier this month on Tracking Blog Posts & Comments. Now, it seems that you can search and track what people are saying on Twitter, as well. [What is Twitter?]
Go to the Twitter search page and run your search. On the results page, you’ll see a RSS Feed for this Query button.
For more info on using Twitter as a Knowledge Base & Expertise Resource, see LawyerKM. Cindy Chick also has a good post on just what you can do with the Twitter search.