:So what does this mean for the use of Disqus by public sector web managers, whose sites have to be squeaky clean on accessibility? In my view it means we can still use it, but with care, doing the following as an absolute minimum"
Multimedia-Stock is a perfect place for people who want to introduce themselves and their creative work to the world and for those who just want to enjoy in viewing or using that work for some purpose.
CommentPress is an open source theme for the WordPress blogging engine that allows readers to comment paragraph by paragraph in the margins of a text. Annotate, gloss, workshop, debate: with CommentPress you can do all of these things on a finer-grained level, turning a document into a conversation. It can be applied to a fixed document (paper/essay/book etc.) or to a running blog.
Publish full articles without needing a blog or site. There's no setup or login. Just write your text and Write4net will publish it using your Twitter account.
WordTwit is a plugin that utilizes the Twitter API to automatically push a published post to your Twitter account as a tweet, using the blog domain as a short URL.
BuddyPress is a suite of WordPress plugins and themes which extends WordPress MU and brings social networking features to a new or existing installation.
kwout is a tool which allows you quote a part of a web page as an image with an image map. To use the service, add the bookmarklet to your browser (no sign up).