Is Kandan still actively developed? Doesn't seem like there's been anything new for a couple of years.
Recently, the thing I've been focusing on lately with the app is bug fixes, small tweaks, and upgrading Rails. There's a lot of feature requests on the backburner, but I want the app to be extremely stable before going a mile wide and an inch deep.
That being said, "Let's Chat" looks like it is a great approach and I look forward to the progress that comes on it. The more open source solutions, the better.
I really like Kanban and I am sad to see it isn't up to rails 4.2 yet. Are you looking for more contributors?
If so, how could I contact you to resolve a few questions so I can get the current repo up and running to work on?