Matsushita will release soon a new CD-RW drive that supports 24x writing speed. The drive's codename is "UJDD410" and below are some technical information:

Interface: ATAPI
Writing speed: 24x (Z-CLV)
Re-Write speed: 10x HS-RW
Reading speed: 40x (CAV)
Writing modes: TAO (Track at once), DAO(Disc At once)
Supports reading/writing CD-TEXT
Supports: Bufer UnderRun Proof protection NULL