I've heard about the Amnesty being in the "law" before but I've not taken any time to research it. I read one of the comments on TTAG about it and someone mentioned that it applied only to firearms pre 1986 and that if you tried to register your post 86 AR lower, it wouldn't apply. I'm not taking it for gospel by any means but it's something I hadn't considered until I read the comment. I think it'd be "good" if they did it at the very least to call attention to the fact that the NFA is ridiculous.
PS I don't expect anything to happen/change with the NFA anytime soon. I did get really excited about the HPA until that dimshidiot in LV effed it up for the rest of us. I'm not real excited about SBRs (braces give you the function without the hassle) or MGs anymore.