The search box is very powerful, but you first need to pick a category from the drop-down. Google lets you add different sources: blogs, newspapers and it shows structured information from Wikipedia and Freebase.
Here's a simple way to visualize the list of posts from two Google-related blogs:
Using data aggregated by Freebase, Google can show some famous paintings by Claude Monet:
You can create interesting timelines using this services and it would be nice to save them or to have a permalink for future reference. Hopefully, the service will also add the option to use custom data sources.
