The domain name has more to do with the success of a site than you would initially think. 

When you are searching for information, do you ever look at the domain name?  I do, I am checking it for relevancy.   If the site is neededinfo.com.  This name has much more creditability than my-needed-info.biz or some variation. 

When the domain name is an exact match I feel that there is a good chance I am in the right place.  When then name contains dashes or is a .biz, .info, or one of the less popular domains I feel there is a good chance the site might not contain the best information.

I found a good article the other day.  not a whole lot of new information but it is a thorough and complete article about the value of domain names.

http://www.seochat.com/c/a/Search-Engine-Optimization-Help/Domains-and-SEO/

One the most interesting parts is at the end, they mention a guy named Frank Shilling and have a link to his blog.  http://www.sevenmile.com/
Some  good and interesting info about domains there.  Worth reading.

What are you thoughts on domain names?

How good does the domain name need to be for your next project?