Here's a cool new product from the Maker Shed: Blink RC. It's a wifi-to-RC board, which can let you replace your RC gear with a smartphone or other wifi-enabled computer. From the announcement:
The BlinkRC from the Maker Shed replaces your standard remote control receiver in your car, plane, or boat, and allows you to control it with your smart phone. The more adventurous can try creating an application on your computer that takes advantage of the open messaging protocol and the BlinkRC’s (3) output channels and (2) analog input channels. Now you can control a variety of different servo’s and sensors from almost anywhere that has WiFi or Internet access.
A few thoughts:
1) Looks good! But...
3) Wifi range limitation makes it inappropriate for most aircraft applications
4) Not open source :-(
Here are the full specs: