Philip Richardson has started releasing a number of videos he calls Titan Screencasts.
In these posts he walks through the use of some features which will probably include:
- Multi-tenant web services
- Duplicate Detection
- Windows Live ID Authentication with a SOAP web service
- New relationship features
- Workflow
- Multi-Lingual User Interface (MUI)
- Plugins/Assemblies in CRM 4.0
- Windows Workflow Foundation Activities
- The CRM Live ‘experience’
- The Internet Facing Deployment (IFD) ‘experience’
- Outlook Client enhancements
- Task Management
- Web Import
- User Management
- Multi-Currency
- Metadata API
- Lookup Auto Resolve
- Translating the User Interface
- The Resource Center
- Mail Merge
- Offline SDK
This is as close as you can get to the Microsoft Dynamics CRM 4.0 experience without driving it yourself.