From the Twitter Blog:
We’ve made it easier to find and follow Twitter accounts based on your interests. When you search for a topic, you can now discover accounts that are relevant to that particular subject. (Previously, you would have seen accounts that have the specific term in their name or username. ) Just click on the “people” section of the search results page or search from the “Who to follow” page.
This new approach helps you find the Twitter users that will best help you follow your interests. For example, if you’re interested in hip hop, chances are that you’d like to follow hip hop artists. Searching for “hip hop” now surfaces accounts like @common and @questlove. (Previously, we typically showed accounts that have “hip hop” in the name.)
To access “Who To Follow” search, click the link with the same name at the top of a Twitter page.
Example “Who To Follow” Search
But that’s not all folks.
If these advanced features look somewhat familiar, kudos.
Advanced Search has been available on the Twitter “search only” site at Search.Twitter.com for a couple of years.
Finally, Twitter has a set of search operators that work on either site. Here’s the complete list.
Sullivan also provides a very useful piece of advice that’s more than worth sharing with other Twitter users.
Remember, Twitter search still remains limited to the past four to seven days worth of information. To go further back in time, you’ll need to use another service such as Google or Topsy.