'Here and now' is accessed from a shortcut at the top of your browser bookmarks. The services will take a little while to load, depending on availability/speed of Internet access and location information.
In the case of weather, you can click through to a web site for additional weather information, as shown above. Currently there are two services available via Here and now. The aforementioned weather and a nearby events listing. In my case, there was no information available for local events listing (perhaps not surprising for a rural area), so a rather non-descriptive question mark was displayed.
Here's the Beta Lab's video talking about the service: