As of last week, Jython 2.5.2 was released, which is with some benchmarks is a 20% performance boost. I'm told that as of Pycon this past weekend, Jython 2.6 has been officially started, which will bring Jython closer to what you currently get with CPython 2.6 (library wise, etc). I can't speak for the project, but my guess is that it'll be sometime next year before that gets to an alpha state.
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As of last week, Jython 2.5.2 was released, which is with some benchmarks is a 20% performance boost. I'm told that as of Pycon this past weekend, Jython 2.6 has been officially started, which will bring Jython closer to what you currently get with CPython 2.6 (library wise, etc). I can't speak for the project, but my guess is that it'll be sometime next year before that gets to an alpha state.