Mary Jo Foley said that on the Windows Weekly blog, her co-host Paul Thurrott have been dicussing about the release for Office 15.
They say that according to one of Paul's close sources, Office 15 would be released and RTMed at the same time in November 2012.
• There will be a Microsoft Exchange Conference in September which at the event the attendes will:
• Get exclusive Exchange 15 content directly from the engineering team
• Get hands-on experience with Exchange 15
• Enjoy unparalleled access to Exchange team members, Masters and MVPs
Read more here:
http://www.zdnet.com/blog/microsoft/microsoft-to-showcase-exchange-15-at-new-september-conference/12321?tag=content;siu-container