I just completed my Office Interop presentation at Convergence in New Orleans and I had a number of people asking about version support for Office and SharePoint since I demonstrated in Microsoft Office 2013. I didn't make a specific mention of Microsoft Office 2010 but, yes, Office 2010 is supported as well as Office 2013.
At a high level, Dynamics AX 2012 R2 supports Office 2010 and 2013, SharePoint 2010 and 2013 (*not for EP yet), and Lync 2010 and 2013.
The Dynamics AX 2012 R2 Office Add-ins for Excel and Word can run and are supported in Office 2010 and 2013. Office 2007 SP3 also works at this time but is not officially supported and may encounter issues in the future.
The documents generated and workbooks exported from Dynamics AX 2012 R2 can also be viewed in the Office 365 web versions of Excel and Word, however the Add-ins only run in the local versions of Excel and Word.
Exports, generated documents, attachments, and templates can be exported to, sent to, placed in, and hosted on document libraries and folders within SharePoint 2010, SharePoint 2013, and SharePoint Onlne.
Dynamics AX 2012 R2 works with Lync 2010 client and Lync 2013 client.
*Enterprise Portal support for SharePoint 2013 is still under development. A hotfix will be available soon.