Last night my amazon affiliate site got deindexed from google. 50 pages of unique reviews and months of hard work down the drain. Seriously I am amazed by this event. And yes I did do a "site: " check... its not there anymore. Also there are 33 back links pointing at the website, so I would assume this isn't even enough volume to trigger a filter of some kind. Even if it did I would be indexed, but with loss of rankings. If I compare this to other sites I own it makes no sense whatsoever.
The strange thing is though, it would appear to me that a deindexed site does not maintain it's PR ( I did a check for deindexed sites and they have PR: n/a), and my deindexed site still maintains its PR.
So my question: Do deindexed sites maintain their PR? Could it be a mistake?