Infoworld has an article with comments from a broad range of companies. The most interesting comments I found are:

Paul Marcoux, vice president of engineering, Cisco development operations, and "green guru," Cisco
Website: Cisco corporate social responsibility page
1. Heading into 2008, companies will continue to emphasize their social responsibility behavior, creating an environment for industry leaders to combine the power of innovation with collaboration to create the most sustainable model for addressing global climate change. As a result, across business and IT functions, we'll begin to see industry standards and green languages emerge in 2008 to foster greater communication and collaboration.
2. If you can't measure it; you can't manage it. In 2008, we'll see a slew of technologies developed to offer real-time monitoring intelligence to measure energy consumption for products. By 2009, there will be few products available that cannot be monitored for energy consumption.
Pat Tiernan, VP of social and environmental responsibility, HP
Website: HP's environmental sustainability page
Green IT will have a more significant focus as we move into 2008. This includes designing products with the entire lifecycle in mind. In addition to energy use, companies will be more vigilant in implementing plans for disposal, reuse, and recycling. Green strategy will also become an argument for the optimization of IT resources, as well as for saving money, with more energy-efficient products.