Comme on limite les inodes, c'est toujours intéressant de savoir les superviser :)

So basically you're looking for which directories have a lot of files? Here's a first stab at it:

find . -type d -print0 | xargs -0 -n1 count_files | sort -n

where "count_files" is a shell script that does (thanks Jonathan)

echo $(ls -a "$1" | wc -l) $1