Kent Beck and David Saff have released JUnit 4.2. Version 4.2 is a bug fix release. JUnit 4 takes advantage of Java 5 features like annotations, varargs, and generics to simplify unit testing still further. If you're committed to Java 5, then JUnit 4 is big leap forward. Unfortunately while JUnit 4 is backward and forwards compatible with JUnit 3 test suites and test runners, it's completely incompatible with Java 1.4 and earlier so I'm afraid most of us will be sticking with JUnit 3 for some years to come.
JetBrains has released IntelliJ IDEA 6.0.2. This is a bug fix release. IDEA is $499 payware. Upgrades from pre-6.0 versions are $299.