Google Maps API has added a couple neat features, including GeoCoding accuracy, Cursor designs, and apparently improved the speed of overlaying maps, as seen with this web site. http://zorgmon.googlepages.com/

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As promised, we've made removing overlays much faster. According to our tests, removing 100 markers now takes 1.5 seconds instead of 18 seconds in Internet Explorer, and 0.5 seconds instead of 8 seconds in Firefox. See for yourself. Next up, we're working on making addOverlay() faster.
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As requested by many developers, we've modified the geocoder to include information about how accurately the address could be geocoded. Look for the Accuracy attribute in the response
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We've introduced new GMapOptions that allow you to set custom mouse cursors for the map. For example, if you prefer a pointer cursor (instead of the hand cursor) but want a crosshair cursor for when the map is being dragged, initialize the map using this call: var map = new GMap2(document.getElementById("mapelement"), {draggableCursor: 'crosshair', draggingCursor: 'pointer'});. We've also added GDraggableObject, which lets you set custom cursors for any draggable object, such as the slider in the zoom control and the overview map.
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Links:
http://googlemapsapi.blogspot.com/2006/07/speed-improvements-custom-cursors.html