The SwitchYard 0.2 release contained full JBoss AS6 and JBoss AS7 distributions i.e. modified AS6 and AS7 distributions containing the "bits" to allow it run SwitchYard applications. SwitchYard 0.3 will also contain a JBoss AS7 Installer, which will allow you to install SwitchYard into an existing JBoss AS7 instance.
This installer is a simple .zip file containing an Ant script plus all the components for AS7. It reduces the download binary size quite a bit - 40M Vs 120M (for the full distribution), and we'll be reducing it more.
The nightly builds can be found here. Just download the "SwitchYard-AS7-Installer.zip" file, unzip it and follow the instructions in the README.txt file.