I just added a Creative Commons license to the sidebar, and hence to the content, of this blog. It was tougher than it should have been.
Creative Commons provides a guide to licensing your work, and the guide includes code generation. The WordPress.com FAQ on Creative Commons gives instructions about stripping out some of the code generated. Even so, it took me longer than it should have to get the linked image into a sidebar text widget, since WordPress.com kept on taking a dislike to the code and stripping out some of it.
There is a Creative Commons widget for WordPress. Nathan Yergler, who wrote the widget, also wrote the following:
Now if only WordPress.com would support WpLicense for their hosted blogs, even more happy WordPress users could be happy contributors to the Commons.
My thanks and support go to Nathan.