Absolutely agree that the term and business plans around "shareware" are behind the times. I saw in one of your other questions that someone recommended your release a web app of your product. Good advice, if it is relevant.
I would check out the following products / companies / movements to help bring you up to speed with new software companies making great progress:
37 Signals, Backpack, Basecamp, etc. - their excellent e-book on starting up a software company today, Getting Real.
They've established a real cottage industry for add on products and companies here.
Evernote, another really relevant software company - check out their podcasts to get a good sense of how they run their company.
Finally, just a general recoomendation for Joel on Software's Business of Software forum.