Iomega has quietly begun shipping the US$399.95 USB version of its Peerless drive ahead of schedule, according the company’s site. Macworld UK also reports that the unit has begun shipping in the UK for £269. The Peerless uses removable 10GB and 20GB cartridge drives, and comes with a 20GB drive. USB 2.0, FireWire, and SCSI interface cables, which can be used with the same base unit, will be available later.