There is growing awareness among British IT managers that energy costs are no longer negligible, and may never be again. A recent commentary from the CEO of Celona Technologies points out words still win out over action. Celona builds software for communications enterprises and it surveyed many of its own potential customers.
Much of the activity seems to be focused on server consolidation and efficiency. A British government agency found that 70% of the lifetime costs of a server is its energy use. BT (formerly British Telecom) claims to have cut its corporate carbon emissions by 60% since 1996. They didn't do this with little electric golf carts whirling around fixing lines and doing installs. No, most of the savings is at the IT level, from data centers to applications efficiencies.
Celona's conclusion: this is a huge opening for better apps and equipment from vendors. The simple fact that BT can quote their carbon emission data is a big step. One many companies haven't made according to the recently blogged information from Sun Microsystems.