See John Bell's recent post about health portals and health-search engines. I agree that 2007 might be a "big year for digital healthcare." At Hubbub, we're advising a new company that will enter the market early in the year, and we will be closely watching how this market develops.
Healthcare continues to be one of the most fragmented and disorganized markets in the global economy. Lots of room for innovation, and you gotta believe that the Internet can wring out some of the inefficiencies.