While my spare time continues to shrink, everything else doesn't. It's been a while since Cake 2.0 came out, and due to the aforementioned shrinkage, I'm not up-to-date with all the changes. Luckily, there are people who are.
My Fusion Charts plugin for CakePHP has now been updated to work with CakePHP 2.0. Actually, virtually all of the work was done by destinydriven, so one big kudos to him.
For instructions for older version of plugin/cake, read this: