As of 30 June 201121 Nov 2012, the following files on trunk had version numbers in them.
QPID_VERSION.txt
cpp/bindings/qpid/ruby/README.rdoc
cpp/docs/man/qpidd.1
doc/book/src/java-broker/commonEntities.xml
extras/qmf/setup.py
java/broker-plugins/experimental/shutdown/src/main/java/shutdown.bndpom.xml (normally handled by the Maven release plugin)
java/broker-core/src/main/java/org/apache/qpid/server/plugins/PluginManager.javabroker.bnd
java/client/src/main/java/client.bnd
java/common.xml
java/common/src/main/java/common.bnd
java/common/src/main/java/org/apache/qpid/transport/ClientDelegate.java
java/management/common/src/main/java/management-common.bnd java
packaging/management/eclipse-plugin/META-INF/MANIFEST.MFwindows/INSTALL_NOTES.html
packaging/windows/installer.proj
python/setup.py
tests/setup.py
\tools/setup.py