isn’t that a bit similar to Common Lisp trace facility (http://www.lispworks.com/documentation/HyperSpec/Body/m_tracec.htm)? Doesn’t Clojure sports its own (it seams to http://clojure.org/libraries#toc29)?

I understand that logging for admin purposes may require something different from trace, something that may be persisted and probably that is your goal, but, in principle you could do that on top of trace, couldn’t you?

I thought about writing an emacs function that would look at the function at point and you could select which variables you wanted printed and it would add print statements before them in the code, and then with an arg this function would remove all print statements from the current function.

Anyway, awesome contribution!