I do believe that there should be some more commonly adopted 'cool' names for the uBTC and mBTC.
My votes are for:
mic or mike for uBTC
and
millie or mini for mBTC
Satoshi for the smallest denomination is pretty much in stone and for good reason.
Anything over 1 BTC is simply a BTC times thousands, millions, billions etc.
I think those cooler names will form with time as bitcoins become more commonplace. Same with the special names for the old Dutch 'gulden'. No need to force official names imho.