This week's book giveaway is in the Other Languages forum. We're giving away four copies of Functional Reactive Programming and have Stephen Blackheath and Anthony Jones on-line! See this thread for details.
It doesn't support any version of Unicode on its own. The Java environments that run inside it support various Unicode versions: Java 5 supports Unicode 4.0 and Java 1.4 and 1.3 support (I think) Unicode 3.1.