I'm sure you know this but all those old cartridges can get "free" stuff at a number of places. My local office store office max was handing out 256 usb flash cards for two used cartridges.
I've updated to readiris 11. It works with an officejet 7200 and photosmart 6180 wireless on the later. So far I cannot get functions other than printing to work from an airport extreme usb wireless setup to either printer. I've not yet tried to get the usb hard disk sharing going let alone trying to get both a usb HD and print server off the airport extreme.