The email wasn't clear, though, since it just talked about the app. It does say at the bottom (in small print) that content is available on the NBC Sports Gold website, but the 'announcement' is a little misleading. They probably should have specified "mobile content".
When I downloaded the new app, it first asked me if I subscribe to such-and-such premium sports channel in my area, which I don't, then took me to a page to ask if I wanted specific content or alerts for those markets. I kept tapping the "next" button and it took me to the main page.
Thanks so much for the clarity.