I am getting the same problem, I would prefer to use Shape 5 module rather than the sourcerer (although that is pretty nice too).
It is interesting that Mike got it to work just by using his own ID, that suggests something wrong with our hab.la accounts, but it works fine for me using the sourcerer plugin / module which suggests something wrong with the S5 code.
I did notice in the JS file it says do not copy it to your own server in case it changes and causes things to break, but I guess you are using the latest code so it should be alright.
Anyway I still think S5 are doing a nice job with their free extensions, they are definitely keeping me coming back here and considering joining up to get access to the rest and the templates. I hope you get this working, but great job anyway