I decided to go with ChaiScript and Falcon as scripting engines for my C++ projects (I don't like Lua's lack of high-level syntax) but Falcon being in heavy re-writting I will use ChaiScript exclusively for now in these projects.
Basically my C++ projects are either games or tools related to digital comics. Currently only my games benefits from ChaiScript:
Radiant Laser Cross: some years ago I made a prototype of a 2d shooter (Danmaku or "bullet hell) game which included ChaiScript to script ennemies but I didn't get very far bar lack of time. I intend to make a full fame of it and I believe ChaiScript be perfect for this game. Here is a video of the prototype: https://www.youtube.com/watch?v=ZdWg6fwecCk
Art Of Sequence (OSS project) don't have a use for ChaiScript at the moment: http://artofsequence.org
I am in the process of integrating ChaiScript in NetRush at the moment.