ZDNet has a review of Samsung's new SW-232B 32X/10X/40X EIDE CD-RW drive. According to ZDNet:
It's...affordable, and it offers generally good performance for a 32X/10X/40X burner. However, the SW-232B's biggest selling point is actually on the inside, where some great technologies make the drive both reliable and nearly silent.
All this silencing goodness comes from Samsung's "Dynamic Vibration Absorber" (DVA) technology. While most CD drives are silent when not in use, DVA apparently allows the drive to run nearly silently even when burning CDs.