Google manages to nail almost everything I use on a computer. Google News is one of my widgets (culled from other news sources, but it comes in through GNews), productivity-wise, I've used GMail and GCalendar for a couple of years, and I've recently blogged about the Desktop and Toolbar, which are part of my iGoogle setup (well, that's when I set them up).
Must say tho', Google Health, only 2 words for this: no way. I want nobody tracking what I'm looking for. It's way too Big Brotherish for my tastes!