Geekbench 2.0.1 has been released. Geekbench 2.0.1 contains a number of minor bug fixes and introduces Geekbench 64-bit (on Windows) and Geekbench Rosetta (on Mac OS X), and is a free update for all Geekbench 2 users.
Both Geekbench 64-bit and Geekbench Rosetta will only work for registered Geekbench users, so if you haven't got a Geekbench serial number yet you can get one instantly from the Primate Labs Store.
For those who are curious, I'm totally planning on doing a 64-bit version of Geekbench for Mac OS X. It's just going to have to wait for Leopard to be released, what with the limitations Tiger puts on 64-bit applications.