The new Yahoo!Maps beta looks like a decent ripoff of Google Maps GUI. They added a very cool overview window that previews your zoom extent. They even updated the Ajax API. Very nice. I was a little disheartened to see all of the Flash APIs. I really hope web development doesn't go in that direction, as I don't really like the interaction between those components and the rest of the page. However the JS-Flash API appears to make everything accessible with no Flash programming required, so maybe that is least evil way forward.