Update: Twitter's also released their own widget, which you can see embedded at the end of this post.
As predicted the Twitter Lists API is causing a fast frenzy amongst Twitter developers anxious to be first to support the new Lists feature. Just this morning we saw Seesmic Desktop release a new version of their application to support Lists, and now there's news of a brand new widget.
Twitter Lists Widget is a simple widget built by TweetGrid with a big purpose: letting you create a widget to display tweets from your Twitter Lists.
To embed a Twitter Lists Widget on your blog or website, here's a quick tutorial. Copy the code below, but replace '@username/listname' with the full list name. So if you wanted to embed our Mashable list, you would replace '@username/listname' with '@mashable/mashable'. The end result is an automatically updating Mashable Twitter Lists Widget with tweets from all of us at Mashable.
/* widget config */
var jtw_list = '@username/listname'; /* full name of the Twitter List */
The rapid acceleration of applications supporting the new Twitter Lists reminds us of the early days on Twitter, when it seemed like there was a new application being released every five seconds. It's hard not to see parallels between today and the initial developer ecosystem that went hand in hand with Twitter's explosive growth.
Update: Twitter's getting into the Lists widget game with its own Twitter List widget as well. While the code is longer, it is more user-friendly to build. Here's an example of the Twitter widget for Mashable: