Zimmerman legal fund

I just received a bit of mail asking about the Zimmermann Legal Defense Fund, which, like many folks out there, I support. The writer implied that he might give money because I suggest it in my sig, but expressed questions about its legitamacy, and questioned if it's "just someone trying to exploit the Zimmerman case" Could someone in the know talk about the relationship between FV and the ZLDF? I don't like to spread misinformation, so I won't answer based on conjectures.