iPodHacks updated with a rumor that Apple will be releasing a PC-version of the iPod with a Windows based iTunes-like application... the partner to provide the software? RealNetworks...
Macrumors can provide some independant confirmation of (parts of) this rumor... PumaCode who had previously provided accurate tips regarding OS X updates reported back in February that a PC iPod was in the works... though at the time it was reportedly being developed simultaneously with the 10gig iPod (which has since been released).