That's cool - it would be really nice for this project and it looks like it's available now but there's not enough technical info about it yet.. the datasheet just has a diagram of the board. The website says that it uses the VDIF command set (presumably with some extra commands like PLAY or something) but the VDIF docs don't have the VMUSIC1-specific commands in there yet. Someone on the avrfreaks forums said he got one already but now he's finding the same thing - there are no docs.