gpmgroup - 9:33 pm on May 31, 2011 (gmt 0)
Try a few major sites like webmasterworld.com etc.
From a theoretical RFC point of view the non www should redirect to the www. This doesn't need to affect branding.
While it can be argued that branding has surpassed the classical way of doing things it can also be argued that this approach could be limiting in the future (depending on how the web evolves).