I got a new esp8266 yesterday. an ICSP programmer and a hackaday trinket pro.
for some serial interface magic. now just need a voltage regulator for 3.7v lipos for the tiny little esp8266
amazing. 6$ for a wifi AP and client and microcontroler all in one tiny little chip
serial interface and two GPIO pins
so can connect the trinket up to it to conect more GPIO via arduino software :-)

esp82666 is a good add on to ANYTHING
the esp runs a compilled programm only so no OS
It's so cheap it's hard not to get one :-)

http://www.seeedstudio.com/depot/s/esp8266.html?search_in_description=0
http://hackaday.com/tag/esp8266/
some examples in the second link and a china shop to order from in the first.
you MIGHT like the trinket pro also: just for artistic reasons :-) :http://store.hackaday.com/products/trinket-pro-with-black-solder-mask-and-the-hackaday-io-logo

...
https://nurdspace.nl/ESP8266

http://www.zoobab.com/esp8266-serial2wifi-bridge
how to export serial consoles through the network with the ESP-LINK firmware: https://github.com/jeelabs/esp-link