I know this isn't going to be much help, but somewhere recently I've seen an advert for a 500gb media player for £300. That, I think is bigger than the Brennan, and cheaper, and should be able to do everything the Brennan does in terms of reproduction and storage. How it would go on about databasing the tracks, I've no idea. But it certainly sounds worth investigating.

Would anyone have any idea what this piece of tackle is called, and where it can be obtained from.