I have been able to get the following Matlab plugin to work with my JSON return string: http://www.mathworks.com/matlabcentral/fileexchange/23393 (I am just copy and pasting the JSON into a file from my web browser)
However the RESTful webservice that I am hitting requires a login. I have been able to do this in java using org.apache.commons.httpclient.HttpClient;
but can't seem to find a clean way of doing this in Matlab ...