For those who are watching.
I modified the darksky.php script to support the latest forecast.io API. I didn't fork Nick Wynja's version on github as it isn't the most recent Alfred 2 version.
To get my modified version of the script, go here: https://www.box.com/s/xct1160ftcjlekaa7qqc
To replace the version that exists in the current plugin, double click on the Run Script icon in the workflow editor, find open workflow folder and drag and drop the script into the list view (remember to click replace).
Again, if you wish to use this I would suggest grabbing your own API key.
Feel free to do whatever you wish with this.