iPod updates are expected by month's end -- most likely during Apple's April 28th Special Event.
ThinkSecret first reported on the new iPod design and sizes (10gb, 15gb, and 30gb)... as well as support for USB2.
According to reliable sources, it appears neither the iPod nor the docking station will contain a USB2 connector -- instead, a Firewire <-> USB 2.0 adapter will now be provided for PC users who don't have Firewire connectors. In this configuration, however, the iPod will not be able to charge over USB2.