Just looked over the code, and it seems like setAuth effects the state of the module, making it impossible to work with multiple accounts. Is that correct, or are there no race conditions to be expected when calling setAuth?
No, this was a by design decision that I made. I've been rethinking it though as we've had some multi-account needs at Nodejitsu. Perhaps refactoring 'core.js' into 'client.js' to support these scenarios.
There would probably be race conditions from this line, since the X-AUTH-TOKEN is set from the cloudfiles.config object: http://github.com/nodejitsu/node-cloudfiles/blob/master/lib/cloudfiles/utils.js#L120
Fixed in 0.2.0