For the benefit of those of us who don't use Chinese keyboards, how do you actually write the ideograms? And text on a 12-button mobile keypad?? Perhaps you could let us know in a future article.

(For those who haven't thought about it, try and work out how a Chinese dictionary or phone directory allows you to look up a character or name!)

Yup. MM = mei mei, "little sister", just how Simon Tam used to refer to River, his little sister. See also the Firefly Chinese Pinyinary...