"I've actually not used rsync .. Can you describe roughly how it works?"

Me neither, I just keeping reading about how great it is on these boards.

"Can you describe roughly how it works? Is it basically mirroring? Does it sync bidirectionally (i.e. if you update your Empeg at work and come home and rsync, will it put the new work mp3's on your home machine as well as new home mp3's onto your Empeg?)"

Yes, you just described how it works. There are some problems with fid numbering and having to resync in emplode before the new music shows up I think. The database also has to be rebuilt so getting around using emplode/jemplode was difficult.

Sean