Corsair Memory, Inc. today announced their new XMS2 family of xtreme performance DDR2 memory modules.
The first product in this family is the Twin2X1024-4300, a matched pair of 512MB 533MHz 240-pin DDR2 modules. This product has been tested extensively on several different DDR2-based motherboards and is expected to be 100% compatible with the newest DDR2 chipsets and motherboards.

As a side note, the first batch of DDR2 supporting motherboards are not expected until March/April this year, and in case you were wondering, DDR2 is not backwards compatible either.