Other targets included retail giant Amazon.com, electronic auction house eBay, discount retailer Buy.com and CNN Interactive, all hit Tuesday, and the portal Yahoo!

CNN: hacking

Ebay, the online auction house, took the extraordinary step of blocking out electronic inquiries from Auctionwatch.com, which aims to scour all auction sites and post prices in an overarching service.

FORBES: Spiders and Lies

The ISE is an auction market for options trading on an electronic platform.

FORBES: Magazine Article

The NYSE has been under pressure to become more of an electronic-trading model and ditch its centuries-old floor auction model.

FORBES: How Much Is That NYSE In The Window?

It is awaiting regulatory approval of its hybrid plan, which would increase electronic trading of listed stocks but still preserve its 200-year-old auction system using specialists on the exchange floor.

FORBES: The NYSE Trades Up

His likely successor at NYSE Euronext (nyse: NYX - news - people ), Duncan Niederauer, is a fellow Goldman alum who has expressed disdain for floor brokers--another sign the ever-shrinking auction floor of the Big Board is giving way to NYSE's electronic systems.

FORBES: Merrill Hires Mr. Fix-It