Awooga uses GitHub as a single sign-on (SSO) provider. Awooga stores just your alias (e.g. "https://github.com/username") and the usual things, like your IP address and access times. Email addresses and passwords are not stored at all, which is why SSO is so secure. The least possible read-only permissions on your account are used, and you can revoke access at any time via your application settings.
Contributed material will be added to a database for publishing here, and for redistribution via an API to any third parties that would like to consume them, for the purpose of improving the quality of online teaching materials. Thus, reports here become copyleft when they are added (they will probably be relicensed as Creative Commons).
If anyone is interested in support for other SSO providers e.g. Twitter, do get in touch.