The economist has a nice graphic summarizing data from Symantec that shows that the most popular "products" on offer from cybercriminals in the underground economy are – not surprisingly – bank account details (for accounts that have on average a balance of nearly $40K) and credit cards with security codes.  The bank account details will cost you $10-1000 each and the credit card info runs 50 cents – $12.  This sector of the economy is recession-proof as well.

You can read the full report (84 pgs) here and the executive summary (16 pgs) here.

You didn't have any illusions about your financial data being safe, did you?