Missing functions in Google Maps API V3

I am upgrading trackyourruns.com from Google Maps API version 2 to version 3. The process has been fairly painless but I have discovered that a few key functions are missing. For example I was using the getLength() method of GPolyLine (PolyLine if V3) to determine a line’s length in meters.  Currently, there is no way to do this using version 3 of the Maps API.  Fortunately, José Fernando Calcerrada created extendedApi which adds functions to LatLng, Marker, Polyline, Polygon that are missing in V3.

TrackYourRuns V0.2 is live

trackyourruns.com allows you to figure out how far you ran (or plan to run) using Google Maps. A few different websites can already do this but I think they are a little user-unfriendly. Some improvements trackyourruns.com provides over the other websites include:

• Large map that is not covered in advertisements
• Intuitive handling of mouse events (like zoom with the scroll-wheel)
• Map controls that are self-describing

I have many more convenient features planed. I will post updates here as they are developed.