Here is a home made, "quick and dirty" extension that allows you to (finally!) display a simple tag cloud in eZ Publish 4.x

This tagcloud solution is mainly based on the ezwebin extension shared by eZ Systems

The archive may be unzipped under GNU/Linux with a single command-line :

tar xjvf archive.tar.bz2

or under MS Windows using 7zip

Use it easily ! :

{eztagcloud( hash( 'parent_node_id', 2 ))}

Download it here : simpletagcloud.tar.bz2

Feedbacks and contributions welcome.