I found a site that has Shuukyou for download. I must warn you that the song is very weird and odd.
I've listened to this song since I got it last night, and it's basically the main theme for Estreya, one of the comics that I want done. I am currently shopping around for an artist for it so it can be done. It is an incredible song to be the inspiration to one of my comics and I'm really happy that my friend, Rie, introduced me to Shiina Ringo. Awesome, just awesome.
You can find the song here:
http://www.projectj.net/shena.htm Sweetness. I can listen to this song forever.