We are currently using the Static Maps on a mobile site. I really like your idea, but one issue with mobile is that people often download multiple images in their CSS and just apply the desired one for mobile. I see a similar problem here. Essentially the user is downloading and waiting for both images to load and then you are ripping out the one not required. Why not try and do this server-side and only send the appropriate image.
Pavvo Vitunnan
We are currently using the Static Maps on a mobile site. I really like your idea, but one issue with mobile is that people often download multiple images in their CSS and just apply the desired one for mobile. I see a similar problem here. Essentially the user is downloading and waiting for both images to load and then you are ripping out the one not required. Why not try and do this server-side and only send the appropriate image.