They're planning on releasing documentation soon (as announced here).
Otherwise, as described in that same thread, I've been able to build azureus2_cvs, oneswarm_az_mods, and oneswarm_f2f. I did have to edit the build.xml files to the right .jar files in classpaths and to include missing resources in the final .jar files.
azureus2_cvs
The only change was to include missing resources in the final .jar, by including a fileset tag in the jar action.
oneswarm_az_mods
After commenting out the missing taskdef resource (antlib.xml), you need to fix the az_jar.dir property:
<property name="az_jar.dir" value="${az_mods_project}/../azureus2_cvs/dist/" />
and add two more .jars to the classpath:
<pathelement path="${az_mods_project}/../azureus2_cvs/build/libs/swt-win32.jar" />
<pathelement path="${az_mods_project}/../azureus2_cvs/build/libs/swt-xosx.jar" />
Also include missing resources in the final .jar, by including a fileset tag in the jar action.
oneswarm_f2f
You need fix and add .jars on the project.class.path classpath:
<pathelement path="../azureus2_cvs/dist/Azureus2.jar" />
<pathelement path="../azureus2_cvs/build/libs/swt-win32.jar" />
<pathelement path="../azureus2_cvs/build/libs/swt-xosx.jar" />
and on the tests.class.path:
<pathelement path="../oneswarm_az_mods/deploy/OneSwarmAzMods.jar" />
<pathelement path="../azureus2_cvs/dist/Azureus2.jar" />