Use Satoshi's with the familiar "computer" prefixes Kilo (K), Mega (M), Giga (G) etc.
I agree. milli BTC is also messy because micro also has first letter m and then you have use the weird u thing.
1 BTC = 100.000KS/100MS/0.1GS
Right now one apple/can of cola should be 0.5-2MS, nice and simple.