Below are major communities for sharing text under CC licenses. For other communities, see:
||Scribd is a community for uploading and sharing documents that has enabled CC licensing.
How to publish on Scribd
||SlideShare is a community for sharing presentations, documents, and PDFs under CC licenses. Various professionals are linked through sub-communities via LinkedIn, Facebook, and Twitter.
||WordPress is a blogging platform and self-hosted blogging tool. In addition to easily setting a default CC license for your blog, WordPress widgets and plugins exist to make CC licensing easier.
How to publish on WordPress
Blogger is Google's blogging platform.
How to publish on Blogger