The new app engine technoglogy from google is a great way to deploy some webapps for small business. Usually it's a pain when your on site server fails and you can't do your work. In such a case, a backup web service hosted by app engine could be useful. Since the reliability of the web service cannot be guaranteed for both external and internal services. It might be useful to have web services deployed both internally and externally. Free services such as app engine might make this much more feasible.