I've just bought an old iphone 3GS. I want to plug it into my a/v receiver but I'm having issues finding a suitable product. I really want to use an optical/coax spdif connection to the receiver. It seems to be possible, onkyo have the NDS1 and wadia have a solution too. Are these two products really the only way of getting digital output out of these phones/ipods? It looks as if transports like this need an apple authentication chip to get the raw audio out of them - I've done a bit of googling and can't believe that there's not some cheap chinese knockoff product that has an spdif out. It's pretty much the only 'feature' I'm after from a dock, and I'm not hugely keen on spending £100+ on a small plastic box that simply does this.