Replacing the familiar iChat, Messages is an instant-messaging program with group-chat capability and a dash of text messaging mixed in.

CNN: Review: Mac's Lion adventure continues

And the environmental group WWF said ministers had "decided on a legally neutral text with few binding timelines and concrete measures".

BBC: EU agrees to new fish dumping laws

Think of text messaging, but with the additional dimension of talking to a group of people, a community or even everyone in the organization.

FORBES: Corporate Microblogging Helps Employees Migrate Work Conversations Online