PhpTop
Today I discovered PhpTop and I must say it looks really cool. This will show Php processes like top.
To install, you can either get the .deb packages or just download the binary (which I did to try out first), and add this to your php.ini (I personally added this to /etc/php5/conf.d/phptop.ini which seems to work as well):
auto_prepend_file=/path/to/phptop_hook.php
And voilà.
You can even output to HTML and hence generate a nice web page... .