I was always intrigued that Lorax is generally online at the same time I am when she lives in Ecuador along the Pacific coast, which I of course equated with U.S. West coast. But I bought a $0.99 iPad app called Living Earth last night, and I can clearly see that we're on the nearly same sunrise line (I know there's a proper term for that). In comparison, right now at 11AM for me, it looks like PNW is just waking up.
It also shows updated cloud covers all over the globe -- as well as night side illuminations. Really cool