Is there anything to suggest this is real? Classic scam would be to just sell a bunch of random data, people tried that when Mt Gox was compromised. People apparently provided "samples" on IRC with either random data or data from other leaks presented as being from the Bitcoin exchange.
A quick google search shows
• http://pastebin.com/L7CYznfK
• http://pastebin.com/4YRgEwPb
that have the same message with different bitcoin addresses.