Here is the Instance-Node made by Majoul (fr.)
It has been published in the 3dAttack-magazine of May’05 with a large tutorial.
The node makes it possible to make as many instances of an object as one wants at any given time.
There is another node never unreleased before that does the same thing exept it makes instances or copies of the object.
Here is the instance node,
Link the object to make instances of to the object port. link an empty Null to the container (instances will be created here) and set the number of instances.
This is the instancemaker + it has a mode port to determine whether you want instances or objects to be created,
There are 3 files with examples of instances on splines, instances on a polygonal object and instance variations along a spline.
Click on the xpresso tag to set the preferences and attributes. And enjoy!