It's possible to successfully install SwitchYard eclipse tools into Eclipse Juno, if these update sites are defined to resolve dependencies:

JBT - http://download.jboss.org/jbosstools/updates/development/juno/
m2e - http://download.jboss.org/jbosstools/updates/m2eclipse-wtp/
SY - jar:file:/jboss/local/downloads/switchyard-site-assembly-0.6.0.Beta2.zip!/
EMF - http://download.eclipse.org/modeling/emf/updates/releases/
GEF - http://download.eclipse.org/tools/gef/updates/releases/

But - trying to install SwitchYard eclipse tools into JBDS 6.0.beta1 fails with this dependency error:

Cannot complete the install because one or more required items could not be found.
Software being installed: SwitchYard Tools 0.6.0.v20121031-1758-H213-Beta2 (org.switchyard.tools.feature.feature.group 0.6.0.v20121031-1758-H213-Beta2)
Missing requirement: SwitchYard Tools 0.6.0.v20121031-1758-H213-Beta2 (org.switchyard.tools.feature.feature.group 0.6.0.v20121031-1758-H213-Beta2) requires 'org.maven.ide.eclipse.wtp.feature.feature.group 0.14.0' but it could not be found

Adding this update site:

http://download.jboss.org/jbosstools/updates/m2eclipse-wtp/

Results in this error:

Cannot complete the install because of a conflicting dependency.
Software being installed: SwitchYard Tools 0.6.0.v20121031-1758-H213-Beta2 (org.switchyard.tools.feature.feature.group 0.6.0.v20121031-1758-H213-Beta2)
Software currently installed: JBoss Developer Studio (Branded Product) 6.0.0.Beta1-v20121024-2033-B58 (com.jboss.jbds.all 6.0.0.Beta1-v20121024-2033-B58)
Only one of the following can be installed at once:
Maven Integration for Eclipse WTP 0.15.3.20120830-0850 (org.maven.ide.eclipse.wtp 0.15.3.20120830-0850)
This version of m2e-wtp cannot be installed on top of the already installed m2eclipse-wtp. Uninstall the previous version of m2eclipse-wtp and try the install again. 0.16.0.20120914-0945 (org.maven.ide.eclipse.wtp 0.16.0.20120914-0945)