I found a great little iPhone application at the weekend, an anemometer which works by measuring the sound the wind makes going into the microphone. I was a little sceptical about how accurate this can be but having a read around various forums seems to suggest it is amazingly accurate. The screenie below is from Wind Speed (Broken link http://www.sis.si/iphone/wind-speed/) which is the one I’m currently using but I’ve found another one called Wind Meter too.

I figure this could come in handy if I ever start to fly model gliders again, worth £1.19 of my money any day!