The company was in the news last July when their database was hacked.
The potential for damage is because the company's core business was setting up connections between married people - a dating service for those wanting an affair.
Now, from Wired:
Hackers finally post stolen AshleyMadison data
Hackers who stole sensitive customer information from the cheating site AshleyMadison.com appear to have made good on their threat to post the data online.
A data dump 9.7 gigabytes in size was posted on Tuesday to the dark web using an Onion address accessible only through the Tor browser. The files appear to include member account details and log-ins for the social networking site, touted as the premier site for married individuals seeking partners for affairs. Credit card and other payment transaction details are also part of the dump. AshleyMadison.com claimed to have nearly 40 million users at the time of the breach about a month ago, all apparently in the market for clandestine hookups.
Divorce lawyers are going to have a field-day!