I just saw an interesting interview with Adam Glick about Exchange 2010 and Windows Mobile 6.5.

A short summary of the interview about the new features:

Windows Mobile 6.5 and Exchange 2010

• Conversations and rules
• Voice Mail and play a voice mail from within the e-mail
• Get free busy information from people

For IT-pros

• There is an option where you can block specific devices
• quarantine devices
• get reports about mobile devices which are connecting to Exchange 2010.

An interesting side note is that Windows Mobile 6.1 devices can automatically upgrade to Windows Mobile 6.5 when connecting to Exchange 2010.

See the interview here.