Ever since Twitter Lists started rolling out to all users, there has been a big race to add the feature to all the popular Twitter clients.

Web apps and Adobe Air-based apps got in on the action first and some native-platform clients are also on-board, but what about the platform that is responsible for much of Twitter’sTwitter explosive growth: mobile?

It has taken some time, but now Twitter List support is making its way into some iPhone apps. Just yesterday, Twittelator Pro (iTunes link) pushed out List support and very soon that same feature will be available to Tweetie 2Tweetie 2 (iTunes Link) users.

When we first previewed Tweetie 2 at the end of September, many of Twitter’s newest features, like native support for retweets and geolocation support, were still being implemented into the system. Twitter Lists were officially announced a few weeks after Tweetie 2 hit the App Store and its developer Loren Brichter got to work right away.

The next update to Tweetietweetie 2 won’t just bring Lists support, it will also add some enhancements to the Retweet functionality as well as some other UI enhancements and tweaks.