macromind, type-in domains have already lost some value, because of the way browsers handle typeins. People use to go to the top and just type "porn" and they would automatically end up at porn.com.
Now you do that, and you are likely to get a search page.
http://www.google.com/search?q=porn&...e7&rlz=1I7GGLC
So now typeins require that the surfer type "domain.com" to get to where they are going.
With the addition of search boxes and toolbars on the average browser, the surfer has about 5 different places to search from, so it isn't a given that he will even type into the address bar. More likely, he will type into the google search, the live search, or the yahoo toolbar on their system - or to the computer manufactures search page that comes up default when they load the browser.
They are still getting tons of traffic, but not like they use to.