OTIPS

I find no-www plugin in photomatt.net, you can see detail in the following sites:

http://photomatt.net/2006/06/13/wordpress-no-www/

After being frustrated with mod_rewrite mojo, I wrote a quickie no-www plugin for WordPress that redirects people to the non-www version of your URLs, in the spirit of no-www.org.

http://no-www.org/

By default, all popular Web browsers assume the HTTP protocol. In doing so, the software prepends the 'http://' onto the requested URL and automatically connect to the HTTP server on port 80. Why then do many servers require their websites to communicate through the www subdomain? Mail servers do not require you to send emails to recipient@mail.domain.com. Likewise, web servers should allow access to their pages though the main domain unless a particular subdomain is required.

Succinctly, use of the www subdomain is redundant and time consuming to communicate. The internet, media, and society are all better off without it.