I may have mis-worded a sentence - I know you already sell directly - I meant to say it shouldn't hurt to pull Kurt from Amazon and just sell from here and other .com's.
Of course we all take concern for the well being of the entire community of musicians who sell their music on Amazon and I'm sure many will raise hell. If it were me and they were trying to cut into my profits just for them to gain a bigger market share of mp3 sales I'd pull my music from their site.
The reason so many people use itunes is because its simple. Apple provides the hardware that links to a software. You buy the track and it goes directly into your ipod and off you go. Of course you can do this with other mp3 player brands and use Amazon but I guess the majority of people like how streamlined the itunes system is.
In relation to spreading Kurt's music as far as it can go - I think it would be an interesting study to start a thread here called how did you hear about Kurt? That could shed some light on how to target more fans. Rarely have I ever became a fan of a musician or group because an mp3 selling website said if you like "x" you also might like "z". I found out about Kurt through a guitarist from Sweden and then followed up through watching youtube videos to the point where I was overwhelmed by this great talent. From there I bought the music and told 20+ other people about it and inspired some nothern friends to catch him in person at some NYC shows. Id definitely say the majority of my friends who really caught on and loved it were fellow musicians.
I dont want to come off as thinking profit to the max, but Kurt is definitely a musical mind I want to see supported to make a comfortable living and be able to study and compose without limitation. My parents aren't major music heads, but they do know who Pat Metheny is and John Scofield. One could argue that they know about those artists because they've been doing it longer - but I think its largely due to the fact that Pat toured with Joni Mitchell, and John worked with Miles Davis. Those sorts of opportunities pushed them beyond a guitar players circle so to speak.
So basically what I'm envisioning is Kurt Rosenwinkel and Justin Beiber summer tour 2011 Extravaganza!!!! Just kidding. I'm sorry I'm probably rambling, but on a more serious note I know Kurts genius will surpass any companies short sighted method to increase mp3 sales and I wish you guys all the luck.