Streamng iplayer has certainly caught on well and everyone I've spoke to has good things to say about it. Although a supporter of the open-ish flash streaming player, I don't use it much right now. Yes not all the content is there yet but its also limited to my laptop and small computer screens. This is insane when I already consume all my media (tv, films, podcasts, etc) through xbox media centre and a nice large screen.
So whats going on? Well xbox media centre can already play native flash files, supports live streaming from day one and has a complete python backend for interacting with websites like youtube and the BBC radio player already . iPlayer should be a logical next step? And you know what if someone did create a script like the BBC Radio player one it would be perfectly legal, acceptable, promotable and great to use. I've been keeping an eye on the iplayers scripters forum but there still on about the download version. Phil really has everything needed for anyone to build the iplayer for xbmc.