Twitter has launched a new version of TweetDeck, the Twitter client it acquired for a reported $40 million last year.

With the new version, users can create, edit, delete and otherwise manage lists from the app. User profiles have “add or remove from lists” in their menus, also making it easier to manage lists:

TweetDeck also now has two more columns, so you can keep up with more feeds at once. “A new Interactions column, available under the Add Column button, is like an enhanced Mentions column,” explains TweetDeck’s Richard Barley. “It shows not only all of your mentions, but also alerts when you have been followed, added to a list, retweeted or favorited.”

“Perhaps even more interesting is another new column type called Activity,” he adds. “This column shows a real-time feed of all the follow, favorite and add-to-list actions performed by the accounts that you follow. We think you’ll find this helps you discover lots of interesting accounts and content that you may not have previously seen.”

One major improvement is the addition of inline media previews, which lets users see pictures and videos with less hassle. Users will see small previews under related tweets. The option can be turned off if you don’t like it. There’s also a larger view option that comes up when you click the preview.

Last, but not least, “Quote” has been replaced with “Edit & RT” for retweeting – a sure to be popular adjustment.

The update is available for Windows, Mac, Chrome (app) and the web version at web.tweetdeck.com. Here’s a video demonstrating the features:

Perhaps the most significant part of the whole announcement is that Twitter continues to release updates to TweetDeck, and not just focus on the native Twitter clients.