The domain escrow firm that handled the transaction says, in a press release,
The sale is the largest all-cash domain transaction in history. It is the second largest domain sale overall after Sex.com, which sold for reportedly US $12 million in cash and stock during a private sale in January 2005.Link. An early news account at SMH.
UPDATE: Joseph Menn of the LA Times slays all others covering this story with one mighty lede:
The free market has spoken: Sex is worth more than porn.Link to his piece in the LAT.