Google just partnered with Salesforce.com to integrate Google Apps with the service. On top of that, Google is going on tour with some of the Google Apps team to promote its use for small business. I'm hoping to catch them in Kansas City.

Even with heavy promotion, converting users from existing Microsoft products will not be an easy task. There are plenty of people uncomfortable with change, and a good share of them make technology purchasing decisions for their company.

Small business is a much better target than large business. They are probably a lot more ready to try something new, especially if it helps keep a lid on software expense. Small businesses also have fewer employees to retrain on new tools. Even with that advantage, there's still a lot of inertia fighting against Google on this one.

• Review of Google Apps