I uploaded Geekbench 2.0.7 tonight; Geekbench 2.0.7 adds support for Mac OS X 10.5 (Leopard) and adds 64-bit benchmarks for Mac OS X (provided, of course, you're running Leopard). Geekbench 2.0.7 also fixes a number of issues under Linux.
Geekbench 2.0.7 is a free update for all registered Geekbench 2 users.