If you are an Enterprise user you can now get your hands on the bits for Office 2013. MSDN and Technet now have the download links available. Office 2013 will be available to the general public beginning in early 2013.
In addition the Office Server products such as SharePoint Server 2013, Exchange Server 2013 and Lync Server 2013 are also available.
Microsoft has stated that Office Home & Student RT 2013, which is pre-installed on Windows RT machines such as Microsoft Surface RT, will be rolled out in early November. It was stated that the RTM bits would be available a few days after devices were available which is October 26th.
The current targeted Q1 release of the Office 2013 Suite to the general public now seems geared to January 2013.
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