[aviflax]

Fipp might be relevant:

https://github.com/brandonbloom/fipp

[ibdknox]

Fipp is awesome and I'd love to use it, but there doesn't appear to be a clojurescript implementation of finger trees and last I knew he hadn't solved the print-length/depth problem either.

[brandonbloom]

I'll solve the print-length/depth problem, if you write the ClojureScript port of finger trees!