The launch of Resolutions 2.0 by Revolution Health is the first shot in what will be a drumbeat of news releases from commercial health sites in 2008. A combination of technology, marketing, and corporate ambition should cause Revolution, and such rivals as Healthline and Healthcare.com, to break out the big PR all year. But while we're poring through the public announcements, take a close look under the hood. That's where the real battle will be fought. I personally think the target should be Healthways, which we profiled last month, and which is in the business of delivering health care information on behalf of insurance companies. The areas of disease management and wellness management are beginning to merge, thanks to the Web,...