Every company is a media company
Brain Clark at Copyblogger made a great conclusion - or is it true statement? - that nowadays with blogs - personal, conversational, business and corporate - every company is a media company.
My thoughts exactly! Since you are your google results - personal or business, how long is it since you 'googled' yourself? - you should use a dynamic, easy accessible and search-engine friendly media tool to promote your company the best and most honest way you can.
Extra bonus with a blog (I prefer to call them 'dynamic websites' - more approachable term for those who still think a blog is a personal diary) is that you have a focusing tool at the same time. Because writing proper and relevant content on a regular basis (weekly, daily if you like) demands you stay focused on your business purpose.
How else can you 'persuade' prospects, readers, clients to buy in to you if not for focus?
