I disagree. I think that unless the FBI instructs her/he to with hold information, we need to be informed. The more informed we are, the less likely a terriorist will act.
My Favorite Headache is a potential witness against some very powerful and wealthy people, people who don't play by our rules. The most important thing is that she keeps herself safe.
She's shared with us some general contours of the situation. The specific details should be memorialized, as I suggested, and MFH is already talking to the right people, giving them the details. What they do with the information is up to them, and suspect that they'll be acting on it relatively soon. At some point, I hope that MFH will tell us everything she knows, but right now, for her own safety, other than an overview to us, may well put her in danger.