Our good friends at Microsoft announced the Exchange Server 2013 Deployment Assistant has been updated to include the following new scenarios:

These new scenarios provide step-by-step guidance about how to upgrade your mixed Exchange 2007/Exchange 2010 organization to benefit from the improvements and new features of Exchange 2013. Additionally, Exchange 2010 organizations can now configure a hybrid deployment with Office 365 using Exchange 2013 if you would like to leverage the newest improvements to the Hybrid Configuration Wizard

See more on the Exchange Team Blog here.