I have spent time recently on Habari an opportunity to learn something new. I have been with WordPress since September 2005 that was version 1.5.2 when I first tried it. The pick up wasn't too difficult as a user of the platform but quite heavy for me as PHP was new to me and I really want to know the insider of the software that runs behind.
Habari is a great opportunity as it's a new born and core developers or early Habarians as I want to call them are celebrities of the WordPress community. I can't pick up faster than I could but at least I could see it grow day by day.
My test drive is here.