One of my sites didn't disappear, it just dropped from 9 to 530 for the main keywords, with similar drops for all other keywords for the site. Add the filter=0 above, and it's still the same.
I guess I saw it coming, but didn't realize it, because it was ranked 9 on most datacenters, but a few had it around 530 for the last few days. I kinda watched it propagate from those few to most of them today. Now, I see it ranked around 530 on most datacenters, but 9 on just a few.
My other sites seem unaffected. The website that took the hit is just a little over a year old, so maybe back to the sandbox?