Twitter is testing a new feature that would allow users to create lists. This would allow Twitterers to organize the people they follow. For example, you could create a list of your business-related contacts and another list for your local medieval costume meetup.
Lists will be public by default, but you'll be able to set them to private. Public lists will be available for others to subscribe to. The list feature will also be made available for the API.
We've seen listing-type features in third party programs. That's how you get sent back to high school with things like Twitter rankings.
I suspect we'll see things like "most influential search marketers" and "power social media users" that will inevitably include the usual suspects. (Meanwhile, some very fine folks all around the country are rocking paid search and social media and you've never heard of them because they're busy actually working. But that's a post for another day. If anybody has the time.) The nice thing about these lists is that anybody will be able to make them, so there will be a wide array of interesting lists to sift through.
Here are some lists I'd like to see:
1. Cute Pets who Twitter
2. Coffee Lovers Anonymous (yes, we need help.)
3. Amateur Physicists
4. People who like to make lists (oh, the irony!)
5. Former alien abductees
What lists would you like to create? Leave your ideas in the comments below.