This is what it says on their website, GroupTweet:
So how does it work?
- Create a new Twitter account specifically for your group (e.g. initechwebdevs or smithfamily). If you want to make this a private group, make sure that updates are protected in the settings.
- Register your group's new Twitter account at GroupTweet.com
- Tell all group members to follow the group account you created at Twitter. Note that the group account must also follow the group members. (If updates are protected, you will need to approve each follow request)
- Members can broadcast a message to the whole group by sending a direct text to the group's Twitter account. For example: 'D initechwebdevs Just committed the latest code to the repository'
That's it! GroupTweet is constantly listening for direct texts sent to your group's Twitter account. When a direct text is received, GroupTweet instantly publishes it as a tweet from the group account. Since all of your group members are following the group's Twitter account, they will each receive the message. Easy-peasy!
Have not tested it out as of yet...