Nearly every community I belong to has the ability to add RSS feeds to the site, allowing you to add content to the site. Clearspace is similar, however with Clearspace there are very obvious content types. Discussions, Blogs, Documents. And this content when formatted on certain widget sizes are formated to those content types. The problem witt this is when you want to add an external blog, or external discussion into your site it has to go in a seperate widget from the recent blogs or recent discussions and it is formatted differently than how Clearspace typically formats that content.
So I propose that for recent content widgets you allow for feeds to be added, allowing external content to be added to the widget and formated as those specific content types. This would also come in handy for combining content between Clearspace instances