It's possible, but for two things that make me think Prodisc is hanging on, although probably by a thin margin.
Firstly, if you look on SVP, some of the goodies I was referring to, are in stock.
Note the SmartBuy Perfect 10 and the Prodisc Full-Face Printable (Black Bottom) CD-R (Pack of 50). Both of these had been out of stock at some point in the last few months, but are both back in, albeit at about 10% higher cost.
Secondly, my favourite American media store, GenesysDTP also has a nice selection of Prodisc goodies:
In addition, I contacted the owner of that shop to ask if he had heard anything about Prodisc going under, and he replied that he had heard nothing about it and had recieved all recent orders without interruption.
It is indeed possible that Prodisc left the business in August 2008 and whats left now is just stuff left in channel, held by shops and import agents etc.
As for me, I didn't take any chances - I grabbed a bunch of these in mid-2008.