Read the blog at http://blogs.technet.com/b/exchange/archive/2013/07/16/owa-for-iphone-and-owa-for-ipad-are-now-available.aspx

Read my favorites blogs:

Designing a backup less Exchange 2010 Architecture

Step by step guide for upgrading Active Directory from Microsoft Windows 2003 to Microsoft Windows Server 2008

Microsoft Exchange 2010 CAS Array – Steps and Recommendations

Appear Offline in Microsoft Office Communicator Server 2007

Microsoft Exchange 2010 Test cases

Microsoft Exchange Server 2010 Disaster Recovery

Microsoft Exchange Server 2010 Upgrade Guide