http://chart.apis.google.com/chart?cht=qr&chs=200×200&chl=mailto:qr-codes@bretterhofer.at
For docs see http://code.google.com/apis/chart/image/docs/gallery/qr_codes.html
Playground, Testbed and some usefull
http://chart.apis.google.com/chart?cht=qr&chs=200×200&chl=mailto:qr-codes@bretterhofer.at
For docs see http://code.google.com/apis/chart/image/docs/gallery/qr_codes.html