Mystic Music is a great product, and I, too, got the free update to it. PDF authors have a particular advantage over print authors in that a) it doesn't really cost anything to provide updates, and b) they have all of their customers' addresses.
Honestly, I didn't care that much for Sigil's interpretation of the Bard, but that doesn't make it any less of a great product. I have used it in creating my own (still in progress) class, the Minstrel. So, I have gotten use out of it, nonetheless.
And I just purchased his Treasures and Objects d'arte.
I'm printing it (slowly) at work. It's a tremendous work, and should add a great deal to my campaign world. I would recommend it to anyone who has ever tried to fill out a dragon's treasure horde, and wanted to breathe some life into the treasure.
Great stuff.