The rule Dylan posted above is another good example of an excellent rule.
Searching pypi for "content rules' you get about two dozen content rules for Plone. Each one of these makes Plone a lot more useful for site admins and users.
There is so much added functionality lying dormant. (Note: I did try the rule "send to group" it install and shows up put I get an error).
So, how do we get these so they are P5 compatible? For example, can we have a kickstarter campaign to raise money to have people convert? I would be glad to help by testing and writing plone doc entries. I don't know any of the content rule authors. Does anyone know how to contact them?
I realize we all see the world through our own knot hole. What is important to us is what drives us. In the case of the site admin what drives our interest are the features closet to the users and our ability to solve the issues that matter to them and get them to love Plone. Isn't the end user our ultimate customer? If they can't get what they want from Plone, why would they support it?
Thoughts?