Business models for online publishing

While talking about splogging, the automated creation of fake blogs that steal content from others for the sake of making money from advertising, Doc Searls mentions a possible new business model for old media in the online world:

But if Google starts crawling past the paywall, life will change. Suddenly authoritative links to old Times pages will show up with high PageRank values. How long after that will Google offer a “passport” (or will we see the equivalent from some other intermediator) through any number of paywalls, for one low subscription price?

I hope, and I’m sure, we can find ways to make writers make money on the web without having to wall themselves in, just like publishing has historically been paid for mainly by advertising.