As of two days ago, you now can download Sample Data for Microsoft Dynamics CRM 4.0.

You can use sample data in the Microsoft Dynamics CRM 4.0 Sample Database in marketing and sales presentations or for training people to use Microsoft Dynamics CRM 4.0.

The sample database includes a set of comma-separated value (CSV) files that contains the sample data and an XML map file that maps the data to Microsoft Dynamics CRM 4.0. To install the sample data on your on-premise installation or VPC, you must use the Data Migration Manager.