Another issue, the guide linked says to skip to step 4c if you already have bitcoin, but then step 4c tells you to use the account you created in 4a.
I think this would be a lot clearer if you split this up into three guides: "How to buy bitcoin", "How to buy ether" and "How to buy the product".
EDIT: Also, the TLS certificate for alpha.ujomusic.com does not validate in firefox for me, as the certificate chain is not correctly installed on the server.
No problem, this is very interesting and I suspect I'll buy the song just as an excuse to play with ethereum. Haven't had a chance to look at it before.