No, it is isn’t a premium or caffinated edition of Google, it is a green one. The idea is that rather than having a white background, the Google searches have a black background. That appears to save about 20 percent of screen energy usage. Click here for Blackle. The sad thing is that it doesn’t appear to have the personalised functionality of Google. Actually, from the site itself it may not be an official Google product but that shouldn’t deter you from using it.