Google Maps
Ok. Google Maps were presented by Google yesterday. And it is just like the other times: they did what others do but the did it MUCH better.
Just like google.com was better than the other search engines even the time it first appeared. Just like gmail is better than all the other web mail services I've tried (btw, can't IBM license the UI for Lotus Notes web client?).
Now its Google Maps. It does what it is supposed to do (and much more). It's fast. It's simple. It's what such a service is supposed to be.