The Exchange 2010 Beta was released just the other day.  I encourage everyone to read more about all the new features and improvements that we've made here:

Just some of the cool new features:

  • No more Storage Groups
  • No more LCR/CCR/SCR
  • New, simplified high availability with Database Availability Groups
  • All new Outlook Web Access, and integration with OCS
  • and a whole lot more!

You can download a copy of the beta here and give it a try in your lab: