100 satoshis (no more than 2 digits after the decimal point) is the right unit size... but all variants of 'microbitcoin' are awkward names: "microbitcoin", "µBTC", "microbits", "crobits", "eubits", "mubits", "mics".
Unfortunately "bit" is also a problematic name. Some reasons are listed here:
http://zibcoin.org/faq#why-not-bits-to-mean-microbitcoinsThe best bet would be to make-up another distinctive one-syllable word that doesn't have any conflicting meanings inside the Bitcoin system.
My proposal is 'zib', chosen to be very similar to 'bit' usable in all the same places with even-better options for abbreviation and no meaning-collisions. More info is at:
http://zibcoin.org...and discussion thread....
https://bitcointalk.org/index.php?topic=529301Of all the many, many proposals (all of which seem to me to be solutions in search of a problem) "Zib" is the only one I've seen where there's been a real effort to provide the tools and information to make the change - most times the issue is presented as either "all we need to do is... [non trivial thing]" (social problem) or "all the developers need to do is... [non trivial thing]" (technical problem).
Incidentally, the names you say are variants of "microbitcoin" - strictly they're variants of BTC itself, the same way gigabyte is a variant of byte, millilitre is of litre, microgram of gram, etc. Well, the familiar ones are - "crobits" and "eubits" are new to me, and I can't determine scale from the names (which, incidentally, is one thing I do dislike about "Zib" - it uses a new name to replace familiar names).