At the SharePoint Conference today Microsoft announced that a slipstreamed version of Office 2013 and SharePoint Server 2013 with service pack 1 is releasing.
Available today for download from the Microsoft Volume Licensing site, IT Pros will be able to provide full installation versions of Microsoft's Office and SharePoint products with the integrated SP1 bits. This ensures an easy installation of Office 2013 with SP1 to new systems and provides the ability to installwith SP1 directly to R2. It also delivers IT Pros with the tools to create administrative installations and custom deployments.
For those without access to VLSC, versions of SP1 for Office, Project, and Visio will be made available to MSDN subscribers shortly.