In reply to Jay Syder.

Building anything on a subdomain (where someone else controls the TLD) is building on quick sand. This is not good business advice Jay (perhaps as business advice it works for a secondary promotional site, like an old school content farm) for a primary website.

Any day Automattic (or any other TLD holder) tires of your site or would like to be in your business, your subdomain is toast.

As a tiny example, all of Geocities just went offline one day. In the Geocities case there wasn't even malice involved.