Boxee is the latest piece of software to enter the home theater PC space. It’s recently become available as a public alpha. The first build is only for OSX 10.5, but Ubuntu is coming. Built on the XBMC code base-they even hosted the XBMC developer con last weekend-it has the same goal of letting you navigate and watch/listen to all of your media from your using just a remote. There’s more than just that though.