Nice job! I like how lightweight it is.
I've recently built this wrapper for chrome apis for ClojureScript developers:
https://github.com/binaryage/chromex
It converts callbacks to core.async channels (which is a popular clojurescript async primitive) also
it uses chromium sources to generate whole api-index as clojure data structures and then uses macros to generate wrapping / marshalling of API calls. That way I can also retain API versioning and warn API clients when using wrong version / signatures.