I disagree. There is a demand for security, at least among some a certain set of consumers. The current problem is that apparently none of the commercially available routers appear to be worth anything when it comes to security. Every time an article like this appears on /. I keep looking for some recommendations as to what to do. And I never find anything.
The only recommendation I did find was from Mr. Kitchen, about using an old computer and smoothwall. Well, first, physically that wouldn't work (the cable modem, router, and switch all live up on a small shelf near the patch panel for my house. Yes, I paid $$ to get the place wired). Second, I really doubt my ability to keep a linux box up, operating, and fully patched. Keeping the router's firmware up to date is easy (it checks itself, and will pop up on the admin page when a new firmware is available: some will even flash themselves if you allow it): a unix OS isn't going to be that easy.
I really don't understand why some manufacturer doesn't use this as a marketing opportunity. There is a niche here. I'd may more (maybe significantly more) for something that is secure, works well, and meets my needs.