Since the master is commenting, I had to ask: Did you think any about the suggestion I made about coin coloring as an easy way to explain decimals and fractions of coinage?
Also, when this comes out, what kind of plans (if any) are there for GPU mining?
The "coloured coin" implementation I envisioned isn't really about emphasizing smaller divisions of coins directly, but rather about facilitating exchanges between Netcoin and other currencies. Coloured coins themselves have no intrinsic NTC values but can be exchanged for NTC using the chain itself as the escrow. An intermediary could always make a "milli-netcoin" currency and send one NTC in exchange for 1000 milli-netcoins.
The downside with coloured coins is that with widespread adoption, cost in terms of fees may become prohibitive for lots of these transactions to go through. Still, where the coloured coin maintains a large value or can be transferred en masse (think overnight currency exchange among banks), the feature will still probably prove useful.
GPU mining will be available at launch.