Can you confirm if you want to use the 'u' micro symbol or if you'd prefer 'm' or 'mc'?
It might help the designers if they have a bit more direction. Personally I prefer the 'u' or 'uC'
I'd say it's up to the artist's own judgement. I will say that it can't be a big M or people will confuse too easily with Megacoin. So if it is an m, it would be best to be a lowercase m.
