http://docs.micropython.org/en/latest/quickref.html#pwm-pulse-width-modulation
http://docs.micropython.org/en/latest/quickref.html#i2c-bus
FYI: Recent MicroPython Git commits do contain initial wifi support and i am building up my ESP toolchain to compile the port myself. So soon the ESP port of MicroPython will become more interesting for you all, I hope!