Adafruit HUZZAH ESP8266 Breakout

The HUZZAH ESP8266 breakout is what we designed to make working with this chip super easy and a lot of fun. We took a certified module with an onboard antenna, and plenty of pins, and soldered it onto our designed breakout PCBs. We added in:
Reset button,
User button that can also put the chip into bootloading mode,
Red LED you can blink
Level shifting on the UART and reset pin
3.3V out, 500mA regulator (you'll want to assume the ESP8266 can draw up to 250mA so budget accordingly)
Two diode-protected power inputs (one for a USB cable, another for a battery)