Customers upgrading from file shares to SharePoint will probably want/demand to preserve parts of their daily routine. As I wrote before, SharePoint is good but is not perfect. It will take some time for end users to get use to the new way of thinking. Here are two very good articles on how to ease the adoption of a SharePoint deployment:
- Can I Map a Document Library as a Mapped Drive?
- What is the difference between a file server and SharePoint?