Ideas

• ABANDONED Clickable polyline http://stackoverflow.com/questions/9490109/google-maps-determine-distance-along-line
• ABANDONED Draw Polylines by holding down mouse button and dragging. Use spacebar to toggle, need to disable draggable
• DONE How to measure distance - use a spherical formula for two given latLng values, or use geometry library
• PARTIAL Add "rubber band" functionality to distance measurement. Clicking on an existing path adds a marker along path. All markers are draggable. Double-click to remove marker. Show leg distance on map.
• ABANDONED Interactive tutorial, by clicking on various objects, a code window is updated. Explain where to put snippets inside a larger framework. Current objects: Marker, Polyline, InfoWindow, Zoom
• ABANDONED Find out city boundaries from city maps? Example: Sao Paulo pink boundary
• ABANDONED Include code skeleton and color-code fragments in posts
• NOT POSSIBLE How does changing LatLngBounds affect zoom? Extremely thin rectangle?
• DONE New page with map/form template. 50%-50% page, with sample text fields and buttons
• ABANDONED Display as a globe, different projections
• ABANDONED Examples for each item in V3 API documentation
• DONE Why does return (string, address, etc) ends up undefined? Example getAddress' results[0].formatted_address. Answer: is asynchronous, use callback 
• ABANDONED How to save dynamic map with markers?
• ABANDONED Create page with color selection and labels for markers and generate static map
• NOT POSSIBLE Add LatLngBounds to geocoding page
• DONE Geodesic lines is an option to Polyline