This is indeed a great move for GJ....
I started GJ in 2005, and handed it to the Joomla community in 2006, in which they started groupJive.org, I have been excited to see it grow and transform into a very useful component for Joomla.
I am also a long time user of CB, and actually have a site still using the long lost project CB-Enhanced hahaha...
I hope all goes well with GroupJive and I cannot wait to see what the future holds for it, I might just upgrade my version on
www.MyPraize.com which was the site it was originally intended for, and get rid of version 1.0!!!!
Good Luck!