Since Google's made a name for itself with cool satellite data, the folks at Yahoo! are betting that you'll enjoy more up-to-the minute information on their maps.
As with their previous mapping solution, they will provide overlays of restaurants, ATM's, schools, and what-have-you from their "yellow pages" database. They are also overlaying live traffic data when available, and providing a neat zoom-in window that hovers over the map.
There's also info on a new set of APIs, which I'll be checking out. Look for more info in a follow-up post.