Private tweeting

Everybody has a busy schedule these days, and scheduling meetings just for sharing the latest updates is not very efficient, although nothing replaces eye-to-eye contact.

A possible way to keep a loosely coupled team in context would be to use Twitter, but you probably don't want to expose sensitive business information through a public service with no strong privacy assurances.



One way to "emulate" Twitter would be a mailing list where only the email subject would be used, or a Google Group, or ...

Do you have any ideas about this? Do know any free implementation of simple, small-scale, Twitter-like application? If you do, please leave a comment.