Hello,
I have just finished some work on my library formerly known as CouchPdb, PuREST JSON. It is a library for connecting to RESTful webservices and getting and storing data in JSON format. The library includes three objects [rest-json], [json-encode] and [json-decode].
Help patches for these objects are included, as well as (incomplete) build instructions and demo patches.
The library is available from github: https://github.com/residuum/PuRestJson
A demo track using data from bitcoincharts.com is also available from soundcloud: http://soundcloud.com/residuum/the-sound-of-virtual-money
Best regards, Thomas