hmm... It sounds resonable, but from what I've seen in the forums, the knowledge level (be it java, eclipse, bpm, politics or whatever) differs a lot and I think it will raise lots of questions if it is not well documented that a get.dependencies on the examples is needed.
(wow one sentence)
ideally the ant target will have a classpath target that is used to set the classpath for compiling and executing the examples.
that target could also check if all the libs are present and if not, display an appropriate error message or start the download automatically