1 bit is also 1/8 of one USD.
Seeing all the hoopla over BTC versus XBT I would support the following:
1 BTC = 1 Bitcoin = same as it ever was
1 XBT = 1 Bit = 0.000001 BTC
1000000 XBT (Bit) = 1 BTC (Bitcoin)
I would be behind this 100% as it "fixes" the whole BTC/XBT issue and give those who have been worried about the size of the BTC something to use.
Too late to do that, people are already using XBT in systems.
Feel free to make a new code, though. XBI?