Near Time Flow. A Mac collaborative content manager which looks interesting. $99.90 single user.
Flow allows you to author, gather, organize, share and publish the information you rely on – from documents and correspondences to web pages, images and files – in an intelligent and integrated manner. Flow incorporates an elegant hypertext authoring system, a full-featured web browser, an RSS news reader, allowing most of your digital information needs to be met without ever leaving Flow.