The official samples for Oracle BPEL Process Manager 11g are available for download from http://soasamples.samplecode.oracle.com. (Note that you will require an OTN account to access the SOA Samples.)
SOA OrderBooking Demo [4.6 MB]
A demo application that processes orders for a fictitious electronics company. This is a sophisticated demo that spans Oracle BPEL Process Manager, Oracle ESB, and Oracle Business Rules. You must install this demo into SOA Suite 10.1.3.4 or higher.