Hmmmm... Interesting. I checked the Webmaster tools in Google, and it talks about submitting a sitemap... but I'm not sure this is what that is. It seems like a lot of big corporate sites have these types of links. I'd love to be able to do this for my own site.
Any other suggestions?
Edit... after more research... they are called sitelinks. Google controls them when you are the top search result. Oh well...