A new service called TweepML just launched that makes it easy to create and share groups of Twitter users. It's more than just a grouping service though, TweepML is also an open extensible format. What OPML is to RSS, TweepML is to Twitter.
Groups are of course one of the core features of social software, but up till now it's been relatively cumbersome to create groups of Twitter users - even in otherwise feature-packed Twitter clients like TweetDeck and Peoplebrowsr. TweepML makes this process real simple.
As an example, here is a group I created for the ReadWriteWeb writing team: http://tweepml.org/ReadWriteWeb/. Simply click on that link, scroll to the bottom of the page, enter your Twitter login details (TweepML states that it doesn't store that data) and click the "Follow" button. Voila, you're following all of the ReadWriteWeb team!

As well as making it easy to create groups, TweepML enables its users to share them too. There are 'follow' counts on the homepage, showing how many people have followed each group.
In addition to the groups service, TweepML is also announcing an Open Standard Extensible format. This is an XML-based format, similar to the RSS grouping format OPML, for applications and services to share lists of Twitter users. An example use is publishers adding a "tweepml.tml" file to their site listing its writers. We will look to do that for ReadWriteWeb, using the above file.
While there are similar Twitter group services on the Web, such as Twibes and Crowdstatus.com, TweepML's usability makes it stand out. Plus the format is simply a great idea and well implemented.
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No Oauth out of the box?! Come on TweepML..
Twibes supports TweepML as an export format. So, it is super easy to follow everyone in your twibe using TweepML.org.
Twitter groups?
Try twinester.com , very simple and useful.
is not a "link machine" like others twapps....
A truly useful tool but with no OAuth support it's a none starter unfortunatly. 3rd party services should not be using login details & I think reviewers should call them on it.
Good grief. Use OAuth!
This looks like an awesome concept but, sheesh, I'm not giving my account details to an untrusted third party.
The primary reason I didn't implement oAuth is because it delivers a worse user experience. I'll blog about it on http://blog.tweepml.org today.
Thanks for your information, i have read it, very good!
In the series of Twitter clients TweetML suggests an userlist for Twitter. The impressive fact is that the Twitter users that people choose is bundled together, and allows to share that bundle to all. The format is purely XML which promises to be extensible and user friendly to all.
TweepML makes the process real simple.Nice and Useful service to all without bugs!
Wow! Looks like great minds thing alike (or similarly, anyway). Our company, IT DevWorks, was developing TweetPackage.com apparently at the same time as TweepML was underway!
TweetPackage.com does use OAuth. And the package is just a link, so anyone can put the link on his/her website, email it to people, and share it in any other way. No app, tool, or install required.
Like TweepML, we use XML, though obviously with a different schema. TweetPackage is also build in .NET.
We're currently in beta and only we can create packages. However, soon we'll allow third parties to create packages. For 3rd parties, there'll be an added benefit to TweetPackages. Anyone who uses the package is automatically signed up to follow the package creator.
Check twitwho twitter directory that provide functionality to create custom groups of twitter users [http://twitwho.net/].
Oauth login and moderated directory with tree-structure.
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