This is what Nimil had.

HTTPHelper.java

/**
* @author Nimil Christopher
* @date 12 April 2013
* @description This class has the Rest Callouts to publish an application to 
* the CDN
*/
public with sharing class HTTPHelper {
  
  public static Http http;
  
  public static HttpRequest httpRequest;
  
  public static HttpResponse httpResponse;
  
  public static boolean isApexTest = false;
  
  public static String jsonList;
  
  @future(callout=true)
  public static void sendJSONListToServer(List<String> stringList){
      jsonList = 'json : ';
      http = new Http();
      httpRequest = new HttpRequest();
      httpRequest.setEndpoint('http://fierce-springs-2179.herokuapp.com/upload');
      httpRequest.setMethod('POST');
      //httpRequest.setHeader('Content-Type', 'application/json');
      for(String eachString : stringList){
        jsonList += eachString + ',';
      }
      
      jsonList = jsonList.subString(0, jsonList.length() - 1);
      httpRequest.setBody(jsonList );
      
      System.Debug('Nimil Request Body : ' + httpRequest.getBody());
      if(!isApexTest){
        httpResponse = http.send(httpRequest);
        System.DEBUG( 'Nimil Response : ' + httpResponse.getBody());
      }
    }
    
}