Google+ is the newest member of the social media toolkit. It was launched on June 28, 2011. As of this publishing date, it is only available by invitation – not open to the public. However, it WILL make a significant impact on what can be done in social media. Currently, it is not available for business use, but individuals can use it to spread their corporate messages.
a) The ability to send messages to subsets of people rather than mass-broadcast (“Circles”).
b) “Sparks” = You can follow topics of interest.
c) “Hangouts” = a group video chat with up to 10 people.
d) Integration with other Google applications like Gmail, Calendar, Documents, etc.
I would highly recommend that you check it out. If you need an invite, I will send them to the first three people to comment. (Note that this doesn’t always work. Google is trying to limit the access, and invitations don’t always go through.)