okay, so, basically you have (or used to have) a group of friends, right? i'm referring to the mail you forwarded with your record and the recipients : )
i actually don't really know most of those people, and some of them i have never met. but they were all confirmed fans, which i found out from consulting the 2 (maybe 3) people who i originally gave the music to, who in turn gave it to all their friends, and their friends friends, etc