Microsoft published recently the TechReady 2007 Exchange Web Services samples.

Overview
The TechReady 2007 Exchange Web Services samples show you how you can integrate Exchange Server 2007 data within line-of-business applications and third-party solutions by using the new Exchange Web Services feature. This sample includes the following projects:

• CreateMeetingAndSendInvitationsDemo
• AutodiscoveryDemo
• PullNotificationsDemo
• AvailabilityDemo

System Requirements

• Supported Operating Systems: Windows 2000; Windows 2000 Advanced Server; Windows 2000 Professional Edition ; Windows 2000 Server; Windows 2000 Service Pack 2; Windows 2000 Service Pack 3; Windows 2000 Service Pack 4; Windows Server 2003; Windows Server 2003 Service Pack 1; Windows Server 2003 Service Pack 1 for Itanium-based Systems; Windows Server 2003, Datacenter Edition for 64-Bit Itanium-Based Systems; Windows Server 2003, Datacenter x64 Edition; Windows Server 2003, Enterprise Edition for Itanium-based Systems; Windows Server 2003, Enterprise x64 Edition; Windows Server 2003, Standard x64 Edition; Windows Vista

• A computer that is running Exchange 2007 that has the Client Access server role enabled
• Microsoft Visual Studio 2005