I finally got around to playing with myHTPC this evening. I almost like it, but it only seems to display the filename of the mp3 playing, rather than making use of the tags, which is annoying. All I could see of the track playing was something like:

[John Cale]-[Sabotage]-[01]-[Read...

Which isn't quite as useful as, say, the empeg's display (but what is?).

So, I guess, I'll keep looking, unless I find the enthusiasm (in this heatwave!) to put something together myself, which is very unlikely.

Thanks for the suggestion, though.