I have successfully implemented a wind rose on my weather web site. http://weather.wilmslowastro.com/windrose/windrose.php
I had to do some fiddling to get the 'calm' circle in the centre and have it rescale it with the chart scale if required.
One note to the team though, your demo wind rose on the Highcharts web site has the wind speeds reversed, normal convention is to have the slower speeds towards the centre not the outside.
Thanks for providing this funtionality.