Mapperz this week has spotted a couple of very interesting experiments with the Google Maps API.
Terrain Tile Layer
Bill Chadwick has put together this demo of a Google Map that has an altitude indicator to show the altitude at any point on the map.
As you move you mouse cursor around on the map the altitude indicator updates to show the altitude at each location. The demo uses a terrain tile server hosted on Google App Engine to serve tiles of terrain data. There is very good correspondence with the Google Maps Terrain layer contours which are obtained from the same 3 arc second SRTM data.
Google Geocoder Suggests
Esa, a Google Maps API guru from Finland, has put together this Google Maps API demo of a search box with geocoding suggestions. As you type into the search box possible locations, based on what you type, are displayed.
In the example above you can see the suggestions that appear when you type 'Lo'. The suggestions update the more you type. If you add an 'n' to the 'Lo' the suggestions change to reflect the added letter.
When you click on one of the suggestions the accompanying Google Map centres on the chosen location.