New kickstarter project – WiLoader.
WiLoader is fully supported in Arduino IDE. Easily, you can upload your code to your project with Arduino (AVR) through WiFi.
WiLoader has WiFi-UART bridge called WiCOM.
The price of base board is $29 – only WiLoader and headers.
For $49 you get programmer + EVK pack (Mini Breadboard, ATMega328P, crystal, resistors, PIR sensor and another components for development).
Website of project: http://wiloader.com/
Website of campaign: https://www.kickstarter.com/projects/petuniatech/wiloader-the-wifi-programmer-for-avr