Truly amazing, and the inavitable consequence of communication retention in the financial sector, but I feel it's the magnitude that resulted in Enron's entire email communication achive that's seems available online right now.
"Search through more hundreds of thousands of email messages to and from 176 former Enron executives and employees from the power-trading operations in 2000-2002. For the first time, they are available to the public for free through the easy-to-use interface of the InBoxer Anti-Risk Appliance. Create a free account, and go to work. You can search for words, phrases, senders, recipients, and more."
The interesting part is how their ex-risk management provider is providing the data, in between fighting with the Monsters in Your Mailbox.