Google is investing in startup Pixazza, which enables users to click on items in photos to buy them from retailers. So far, Zappos, Bluefly, Eluxury.com, Shopbot.com, Overstock.com and Macy's are among the advertisers.
The two-way medium of the Internet basically guarantees a company's reputation is at risk 24 hours a day. But according to a recent study by the management organization the Conference Board, two-thirds of all companies surveyed had no "social media monitoring programs in place, and 75% report little or no active participation in social media."
When trying to expand overseas, look beyond demographic numbers when deciding which markets to enter, Matthew Cushen writes. He uses Saudi Arabia as an example. There are cultural barriers to e-commerce, such as the popularity of shopping in stores, but it might still be a good bet.
Venture capitalist Guy Kawasaki offers tips for leveraging Twitter for your brand. Among them: Let buzz trickle up; measure how much you're getting "retweeted"; and check out what brands such as Comcast, JetBlue, AmazonDeals and CirqueLasVegas are doing.