This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
I don't know if anyone understands what you envisage from "NLS support" in a driver. Java used Unicode. The thin driver is a type 4 driver, so is 100% Java. Your database is a Unicode database. I don't know what other support you would need from the driver. Can you explain what support you anticipate needing?