Some more DDR2 modules have been added to Kingston's "HyperX" lineup just recently, these being rated for 800MHz at timings of 4-4-4-12. They're available as single 1GB modules, or dual channel 2GB kits.
The press release can be found here.
Fountain Valley, CA - (June 05, 2006), Kingston Technology Company, Inc., the independent world leader in memory products, today announced the release of the NVIDIA SLI-Ready 800 MHz low-latency HyperX® modules. The NVIDIA SLI-Ready 800-MHz low-latency HyperX modules increase overall system performance when paired with select NVIDIA nForce® 500 series-based motherboards with easy, one-step set up. Kingston's NVIDIA SLI-Ready modules, designated with an "N" in the part number, are available in 1- and 2-GB kits.
Kingston® and NVIDIA engineered these specially designed HyperX modules to allow users the ability to boost system performance by simply installing NVIDIA SLI-ready components. Without needing to tune the BIOS, users simply select their performance options during their system configuration to experience enhanced performance.