Guy Kawasaki's Truemors by the numbers post has generated a fair amount of comment from bloggers (nicely summarized by Rick Segal). His point, lost in all of the noise, is that you can prototype and build companies very quickly these days. The results are frequently businesses that don't have high overheads, and thus don't require masses of revenues to succeed. Think plentyoffish.com, and its ilk.
So, who cares if Truemors doesn't appeal to the
Silicon Valley elite masses! If it has appeal, can cover the minimal costs, and build steady traffic, it will be a steady source of income down the road. A number of web developers are doing just this today. There's also a steady business building these new sites, doing the initial marketing to show the viability of the site, and then selling them off to others.