Now that BTC has topped $1000 there is a movement to start talking in mBTC to overcome the psychological barrier of only being able to purchase a small part of something. I think a much simpler solution that will never require additional changes is to simply start referring to uBTCs as "bits." Each BITcoin is made up of 1,000,000 bits. An additional benefit is that each bit then consists of 100 Satoshi's. It couldn't be much simpler and more accessible to the average person.
1 BTC = 1,000,000 Bits = 100,000,000 Satoshi's
I'd would much rather deal with bits than any kind of BTC prefix when it comes to a currency and I think the general populace would as well.
More compelling argument here:
http://www.reddit.com/r/Bitcoin/comments/1rmto3/its_bits/