It is common for many organizations to have a company blog. However, many companies have a blog that is completely separate from their corporate website. Meaning, a company will have a website on one domain name (yourcompany.com), then have their blog hosted on a completely different domain and site (companyblog.wordpress.com)..
“Blogging isn't about publishing
as much as you can, it's about publishing as smart as you can.” –
Jon Morrow
Maintaining a consistent blog is a
fantastic business strategy these days. Aside from (hopefully)
establishing yourself as an expert in your industry, it also shows
that you are actively dedicated.