The CodeIgniter blog has a a new update today with some changes that are happening in the project and it's community.
If you are following CICON 2011 today, then you no doubt already heard from the Reactor team: CodeIgniter is now using Git for source control, and has moved its home to GitHub. Also, CodeIgniter "Core" is not longer being publicly maintained. CodeIgniter "Reactor" is CodeIgniter, so we are dropping that suffix. In short: CodeIgniter is the framework, and Reactor is our community driven development program.
As a part of the move they also released a new version of the formerly-Reactor codebase. The EllisLab blog has more information about the git switch including their reasons and some of the immediate effects they see from the change.