"The brand-new PocketDock Combo is an indispensable add-on for the iPod & iPod mini, Apple’s sensational and wildly successful MP3 players. The tiny PocketDock Combo lets you connect the iPod’s docking port to a standard USB or 6-pin FireWire cable, thus delivering on the iPod’s promise of freedom and independence. The PocketDock Combo is a perfect choice if you’re a PC user or work cross-platform."
This could really come in handy for users that have multiple machines, particularly for people that use both Macs and PCs. On my home PC I installed a Belkin FireWire PCI card. So switching back and forth between my iMac and PC really isn't a problem. But my work laptop is a different matter.