Please read the comments guys:
So it seems you need a boxee software on a PC/mac, the iPad version will link to the pc/mac version and the PC will transcode on the fly. This seems to be how the Plex app works.
Markus January 6, 2011 at 11:01 am
So along with the iPad App. it’s possible to view a movie/file from a HD attached to the Boxee Box on the iPad?
avner ronen January 6, 2011 at 12:04 pm
Yes, but you’ll need to run a Boxee Media Server on a PC/Mac to handle the transcoding (the Boxee Box can’t transcode on the fly)
So yes, according to the comment you can watch video from boxee on the iPad. I would be curious about flash. In another comment he said that a demo video is coming...
Boxee Box owner, lover, and enthusiast!