The lack of firmware updates (with or without a new UI) for the past 6 months and the rumbling that Fetch TV had run out of money have finally all come to a head - it looks like IP Vision, who own the Fetch TV brand, have gone into administration. Strangely, the Fetch TV home page makes no mention of this, but at least the bottom of the IP Vision home page does.
It seems that administrators were appointed on 22nd December 2011 and a little bit more info can be found on a London Gazette page. I'm not sure if it was coincidental or not, but iPlayer and Sky Go apparently stopped working for a short while a couple of days ago, but when I checked iPlayer and Fetch TV's PPV stuff just now, it seemed to be all be working OK.
If IP Vision don't come out of administration, then they'll obviously turn off their servers - not only will their Web presence disappear, but so could 8320HD functuionality, including Fetch TV PPV (obviously) and even the disappearance of iPlayer (which I personally think shouldn't require box registration or the use of any of IP Vision's servers, but that's just me).