The Broadcast messages (BCM) new feature gives the ability for portal administrators to broadcast messages to end users in a short time frame.
End users will be notified on relevant new messages in real time.
The feature is available from SAP NetWeaver EP7.3 EHP1 SP11.
In SP12 an addtional functionally was added:
1) 1) The ability to assign a message to groups.
2) 2) Set a message priority (normal/high).
SAP Note: 1930281
If you would like to learn more regarding the BCM functionality, please ask
for information in the comments and I will try to add it to the blog.