How about fixing your website(s), which use FTP, and possibly Telnet, before focusing on your printers? There are an awful lot of people who would love to be able to replace broken parts without spending 3 days trying to guess the right part number, as well as some of us working on more interesting equipment (like the Alphas) who just love it if you would fix some of those broken links to much needed firmware upgrades.
As for your printers, charge a lot for the printer, give it the ability to run some version of linux (which it probably does already) with lots of RAM and a HD/SSD, and low cost color laser printing. Oh, and network (wired) printing. And people will love you. High DPI printing, scanning (High DPI scanning), faxing (+ over the internet), etc. are just gravy.