I added a simple cell noise generator node for nuke (windows32 nuke5.2/6.2 added, Linux64/macOs nuke6).
Has random, grid and heaxgon mode and cell count and range values.

Cell noise generation code is based on http://code.google.com/p/brianin3d-misc/source/browse/trunk/random/cxx/Voronoi.cpp.

If you use this for a project please drop me a line.

-home page
-developer blog
-this node's source code (in Nuke > Plugins)