I just heard from Chris that the Boxee guys rejected the Jupiter Broadcasting App, as it is 'just' a compilation of RSS-Feeds. This is retarded for a multitude of reasons. All content-providing Boxee Apps are, by necessity, RSS-based. Some have a skin (such as the Rev3 App), others are exactly the same as the one I created (CNET's App for example), namely just a bunch of RSS-Feeds that Boxee's engine will display in a list. So it's ok if CNET uses the built-in RSS-reader, but not when others do???
So thanks to the Boxee guys you'll have to install it manually instead of being able to install it from the repo. Very convenient. -.-
Download the ZIP-File
Extract it to ~/.boxee/UserData/apps (on Linux, others see here)
(Re-) Start Boxee
I'm not sure if this is possible on a Boxee-Box, but if you've built the box yourself, it works just fine.