Pretty much what he said in his book [1]: that the state won't allow any privacy in the future and so the only solution is to require a two-way transparency. There are some good insights here but in the end it ignores the power dynamics (state and corporate power is so much greater than individual citizens', and there's so much privilege for the wealthy and tech-savvy , that transparency's value applies asymmetrically) and presupposes a choice between two bad options.

The book continues to be very influential and so is worth reading -- just take it with a grain of salt, remembering that he's writing as a wealthyish white guy who's never had to face unpleasant consequences from being on the receiving end of transparency.

[1] http://en.wikipedia.org/wiki/The_Transparent_Society