The SfB planning tool has been released check it out and download from
http://www.microsoft.com/en-us/download/details.aspx?id=50357
Note – you cant have Lync 2013 Planning tools and also i found i had to remove all Lync 2013 components installed such as admin tools, debugging tools etc, then it allowed me to installed. Shame i cant have both versions as i have customers with both versions.
Installation errors i found
You will to uninstall the Lync 2013 planning tool first as prompted.
Next i got this message and i thought this was related to the other Lync 2013 tools i have installed such as Lync 2013 administrator tools, resource kit, core core components and debugging tools. I removed these and it installed ok.