When I created a project in Eclipse with jbpm-jpdl-3.2.Beta2 as the source there was a number of compilation issues. These I could resolve as follows:
1) jms example - remove or comment out the offending code. This example uses APIs that do not exist in the product.
2) org.apache.tools.ant.BuildException in src/identity/LoadIdentitiesTask required ant.jar to be added to lib
3) my rules examples require drools-compiler-3.0.5 and drools-core-3.0.5 to be added to lib
4) org.jbpm.jcr.jackrabbit.JackrabbitJcrServiceFactory requires jackrabbit-core-1.0.1 to be added to lib