A-DATA Technology released the Turbo Series 120x Compact Flash card  with Windows Vista ReadyBoost support. The card comes in 512 MB, 1 GB, 2 GB, 4 GB and 8 GB sizes.

The Windows ReadyBoost can improve system performance using a removable flash memory device.

According to manufacturer's release, the Windows ReadyBoost 'is a technology built into Windows Vista that caches disk reads onto a flash memory device. Once activating this feature, Windows Vista will create a readyboost.sfcache file on the flash memory device. ReadyBoost does not cache file writes—it is a write-through cache. Windows ReadyBoost can improve system performance because it can retrieve data kept on the flash memory faster than it can retrieve data kept on the hard disk drive, decreasing the time you need to wait for your PC to respond. Combined with Window SuperFetch technology, this can help drive impressive improvements in system responsiveness. The Windows ReadyBoost Technology will speed up system performance, reduce HDD Read/Write times to increase HDD life, and save power for notebooks using a battery, with Windows Vista certified devices.'