I found this gem:
Bitcoin parity: what is a bitcoin worth?Let's do this with the "bit".
Here's the bit proposal again:
1 satoshi = smallest unit, pretty much in general use today
1 bit = 100 satoshi, eventually every day use, coffee, sandwiches, etc.
1 XBT = 1 bit, should be the official symbol on all exchanges, forex, etc.
1 BTC = 1000000 bits = kept for dealing with larger amounts, may fade
1 Bitcoin/bitcoin as a currency unit fades away
Bitcoin = the Bitcoin protocol
Notice that 1 microBitcoin = 100 satoshi = 1 bit = 1 XBT
So,
what can you buy for 1 bit?