OWA for iPhone and OWA for iPad are now available!
Read the blog at https://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
Microsoft Exchange 2010 CAS Array – Steps and Recommendations
Appear Offline in Microsoft Office Communicator Server 2007
Microsoft Exchange 2010 Test cases