Molly Holzschlag and DL Byron gave a session yesterday on: Picking a Platform: Blogging Engines Compared.
This is an important set of slides for small businesses to go through when thinking about getting into blogging. This is a high-level presentation, but it does raise all the questions that you absolutely need to think about and address before you start.
Molly also gave a presentation on how to build blog traffic. It also raises the questions you need to raise once you have made the step of choosing the platform, how to get going. The Blog Business Summit has archived all the presentations given (and links to people blogging about it). There are more small business people here than large.
So, keep in mind, small businesses can get their message above the noise by leverage technologies, like blogs, to communicate effectively with your customers.