Friday Forum: Building a "Healthy" Pearl Tree

So I learned about this new site called Pearltrees, allowing users to aggregate and organize their favorite Web sites into one location. It's sorta like an RSS feed, except cooler.

The purpose of Pearltrees is to allow users to organize their passions. Here at the School of Public Health, our passion is health, so I'm attempting to build a tree of some of the best sources out there for health-related information. I could use your help.

Here's a screen shot of what I've built so far:

In the center is me, "healthyturtle." From there, I branch out into pearl categories, like National News and National Health Organizations. Each of those categories is either broken down into smaller subcategories, or I've connected to it a favorite health site. To visit those sites, click on the pearl representing it. Check it out here.

One of the coolest things about this site is that it allows me to find others to have similar interests, and we can "swap pearls."

So here's the challenge: Help me to build this Pearltree. Tell me where you go to get your health information, whether it be news, an organization, blog, column, etc., and tell me why you like it and why I should consider putting it on our tree. And is there anything I've put on this tree so far that you don't like? Why should I re-consider?