I was just working on a library of objects for creating and managing many instances. In the process I created a couple examples to play with:

• ticker.pd, a 100 voice clock ticker, make it tick very fast!
• run-200voicestest.pd, a 200 voice sample stretcher and panner

These are based on voicepoly/voicepolywrap, which aims to be an easy-to-use replacement for nqpoly4. You can drop voicepoly.pd and voicepolywrap.pd into your path and then use it from anywhere without having to copy it into your project.