Hi, Kurt:
Blogging is a great way to promote your online business. In fact, I know a number of marketers who have incorporated their blog and their website into one! That's definitely one way to add new content on a regular basis to make the search engines happy.
I try to add new posts to my blog every two days. Experienced marketers recommend every day. Some marketers claim to add new content several times a day! I used to think I was doing well when I was posting once a week!
When I started my business blog, I used it largely to promote my affiliate opportunities. However, over the past number of months, I have been trying to focus more on simply providing helpful insight and techniques for Internet marketing.
If you want, you can click on my blog link and read down through a few posts to see what I like to write about.
GT