Just use BTC or satoshi (0.00000001) like in:
I just bought a car for 10 BTC!
The new Final Fantasy game will cost only 15000 satoshi!
Using mBTC, uBTC, μBTC is just unnecessary, sounds like a different coin and it will confuse a lot of people.
Coinedup and a few other sites are guilty of using mBTC.
1 satoshi is the smallest unit of BTC that's all people should have to learn. If you want massive user adoption you have to simplify things.
With satoshi being such a small unit I prefer bits being added as well. I agree that mBTC and Ubtc etc. are a little confusing.
dBTC cBTC mBTC uBTC (u remplaced by the greek letter mu sometimes is confusing with mBTC)...When you know it is simple to understand but like the idea of BITS or talking in satoshis