This is actually great work! What licence will you apply to the source code?
I just commented one line and added other one to the Backbone.js app. And I've developed the whole GAE application.
Just sayin', if you don't mind, public domain is as good as it gets if you want to share your code.
Unless there is license granting you some rights, you don't have any rights to that code (you cannot legally download, use, modify, copy or redistribute it).
Please don't ask me for specific quote, because I don't know US law, but from what I've read on the topic (http://www.ucop.edu/ott/faculty/crothers.html, http://www.wisconsin.edu/gc-off/deskbook/copyrgt.htm), it's pretty much the same as in the rest of the world, that is:
Copyright is automatically granted to the creator of the work (or his employer, in case of "work for hire") and anyone who wants to legally use it needs permission (license) from the copyright holder.