> Given the single-threaded nature of JavaScript I don't see how 
future-call or agents could be implemented.

There are analogous constructs in a single-threaded, async-callback world. 
In particular, many Javascript libraries have a concept of promises and 
futures for managing the async callback speghetti. Like I said, that part 
of the puzzle needs much more thought. This is step one: Implement robust 
dynamic binding.

> Dynamic binding is often used for configuration.

Configuration that you probably want preserved across an async callback.... 
Imagine binding *parse-response-in-some-special-way* before calling 
ajax-get...

> It's also important to note that what you're proposing could easily be 
provided as a useful library

Maybe... but it would need to override some of the Compiler's 
multi-methods... Proper Var support, on par with JVM Clojure, seems like it 
belongs as part of the core ClojureScript distribution.

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