Hi,
I'm interested in this too. However, I have virtually no experience with Javascript. The place to begin the investigation, I think, is with the new, more general implementation of iPython notebooks, Jupyter (
https://jupyter.org/). Note that there is even a Clojure kernel for Jupyter; thus the ability for users to run clojure notebooks. But that's not what I'm after. Like you, I'm interested in using Clojurescript in the notebook rather than Javascript as means to add custom capabilities. Since Clojurescript compiles to Javascript, I don't think getting things to work will be hard. There are a few jupyter project repositories (very active and probably not yet stable) for things that seem related. Take a look at the repositories under the jupyter project,
https://github.com/jupyter , but note that many of these repositories are only a few weeks old.
Reading some of the developer discussion on jupyter, it appears that they are using a React-like framework called Phospor. This might be good for Clojurscript development, enabling easier use of figwheel (which I've read about, heard good things from other developers, but have not myself used yet.)
Hope that helps,
Peter