Twitter launches Lists: categorize the people you follow

Twitter just added a whole new dimension to their product today. They are rolling out "Lists", which lets you group friends into easy-to-manage categories. Lists are accessible at the following URL pattern: twitter.com/username/list

I think this will enable people to find more specific groups of people to follow. People will rarely look at their main feeds anymore.

The design team at Twitter did a great job of building the user interaction. It's really easy to create and manage a list of people.

When you follow someone, you are offered the option to add them to a list.

Once you build a list, you can view all of the tweets from those people:

Using Lists will be a great way to get more people following you. If you are added to a list, it's easier to follow you as well.

I'm interested to see how 3rd party apps build on this. Also, how will the spammers dig into this? What lists will you make?

More discussion at Techmeme and TechCrunch.