I've been keeping an eye on the SSD1331 library to see if it would eventually work with the ESP8266 wifi modules. I noticed the support for it appeared one day with the Adafruit library so I tried it out on my Adafruit Hazzah and success!
I wanted a clean design without jumper wires so I created revision 1 of this design below. All hardware appears to work fine so far. It's a pretty simple design. No buttons, switches or sensors of any kind. Just a microUSB connector for power and uploading new sketches, an LDO, FTDI usb interface, ESP and a 0.95" color oled display.
The test code I have running below is the default Adafruit test code to verify everything is soldered properly.