I suppose there is some sort of Google event going on this week and what do you know, we’ve got some GoogleGeo news:
Google Maps API v3 - The new Google Maps API v3 enables support on mobile browsers (such as Mobile Safari), dropping the need for keys (hurray!), now MVC-based architecture (about time), default UI automatically supported (so you never have to worry about updating the UI), cleaned up namespaces (everything is now google.maps.* rather than gmap). So what does this mean? Take a look at the old v2 example.
And now v3.
I like the new look and for me it is much more logical than before (plus mobile browser support FTW!). Check out the documentationand the reference. This coupled with the Google Maps Data API really pushes the Google Maps WAY in front of Microsoft and others.