I chose a pretty easy to remember domain name for my game site - two words that describe what it does and are easy to spell. Yet most of the visitors I get (80% who are frequent repeat visitors) actually come from google by typing the domain name into the search.
So no, I think domain names are pretty much worthless. Google is the URL bar. Scary.
Scary? I think it just shows how good the internet is at routing around inefficiencies. The idea of a domain name "shortage" was artificial and hardly benefited anyone but the registrars.
To pick an arbitrary example: "gcc.com" belongs to a cement company and "gcc.org" to a church, yet apart from typing them in directly a minute ago I've never seen those sites, since Google/Yahoo/Bing all direct you somewhere useful like http://gcc.gnu.org/ instead. Thank goodness!
So no, I think domain names are pretty much worthless. Google is the URL bar. Scary.