Nakamoto is a bit long, I will admit, but it is only 1 syllable more than satoshi.
Naka could work as well. This would just be 中. This is also the short country name of China (中国). 中 could be the currency symbol. It is already in unicode...
新 means "new" and is pronounced the same in Chinese and Japanese (xin/shin). That character is also in unicode!!
I like Naka so while we pay a homeage to Satoshi Nakamoto it is somewhat different from bitcoin's naming tradition. We could have the currency symbol at the same time. One stone kills two birds.
So 1 NEM= 1 bitcoin; 1 naka= 1satoshi.