Its not only start up’s or small business’s that have blogs.
Here is a link I found, on a website called socialtext, to all the blogs of the fortune 500 companies.
I assume most of them have blogs to keep their clients informed of up todate developments in their companies, as well as keeping a personal touch with their clients.
Some interesting blogs, worth having a look , you might get some ideas for your own business blogs, from them.
Click Here to go directly to the list.