A while back, I started a thread at Search Engine Watch Forums named Promoting a Site with WWW or Not?
The thread continues on and the discussion is interesting. When promoting your site online or offline, do you use the www before the domain name? Personally, I tend to like what the www represents. So on my business cards, I have www.rustybrick.com, in my email signature I use www.rustybrick.com and when I type it out, I normally put the www before the domain name.
The thread discusses the pros and cons of both and when people prefer to use the www or not.