http://download.jboss.org/jbosstools/updates/nightly/soa-tooling/3.3.indigo/
contains this exposed (categorized) feature:

org.jboss.tools.jbpm.common.feature 	4.4.0.v20120229-2037-H52-Beta1 	| AbridgedTools | SOATools

It could, however, hide this feature like it does for the jBPM jPDL feature:

jBPM jPDL Tools	3.2.1.v20120229-2037-H52-Beta1	org.jbpm.gd.jpdl.feature.feature.group

Same is true for http://www.qa.jboss.com/binaries/RHDS/builds/staging/devstudio-5.0_stable_branch.soa-tooling.updatesite/product-soa/ – feature is currently exposed but could be hidden.

To make this happen, just need to remove the category designations for the feature in the appropriate site.xml files:

http://anonsvn.jboss.org/repos/jbosstools/trunk/build/aggregate/soa-site/site.xml
https://svn.jboss.org/repos/devstudio/trunk/product-soa/site/site.xml