Accually thats incorrect... 3 years ago we were useing 10x burners at most. (affordably at least) cd-r's are designed to burn at any given speed up to what i beileve is 52x at this point in time.the slower the speed, the less chance you have with buffer underruns and faulty burns.
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Mobile-2.2Ghtz Core 2 Macbook, 4GB ram, 160GB HDD
Server-Dual 1.42 MDD G4, 1GB ram, 4 random hard drives.
PC-C2D 2.4Ghtz, Asus Commando, 2Gb ram, 3 hdd's in raid 5, 8800GTS.