I have just set up Office Web Apps Server in a SharePoint 2013 test environment as per document here:
http://technet.microsoft.com/en-us/library/ff431687.aspx
Although I had some issues with Excel Web App at first, I've solved this and excel seems to work ok, However, the Word Web App just sits there spinning and ultimately give the error dialog:
"Sorry, Word Web App can't open this document because the service is busy. Please try again later" The Same link as above has a simple solution :
Did you install Office Web Apps Server on a domain controller? Office Web Apps Server cannot run on a domain controller. Office Web Apps Server must be installed on a separate server that is part of a domain. For more information, see Software, hardware, and configuration requirements for Office Web Apps Server.
I certainly did not install on a DC - its a standalone server.
ULS Logs are growing by 2K per second even when I am not doing anything on the server.
VERY FRUSTRATED!