I am using the OPML Editor, created by Dave Winer, to run two web applications, Radio2 and River2. The OPML Editor is the predecessor to Fargo and is somewhat unique in that it is basically a Windows (and OS X) Server application. You can run it on a desktop computer and use the application's UI to create and edit outlines, but it also has a server component that servers HTML and executes code written in Frontier.
If the desktop computer has an Internet accessible IP address, you can access the applications, or tools, that the OPML Editor supports. I am running the OPML Editor on a Windows 2003 server hosted in the Amazon cloud, and it has been running well for me for more than two years. Because I run the OPML Editor on a server, I can access the Radio2 and River2 applications from any personal computing device on the Internet.
Radio2 is a linkblogging application that works pretty much like Fargo's noteblogs.