Hey Emil, Thanks for the suggestion. In the next version, popups created in the global scope will be displayed on all sites
If you had already created some popups you should be able to use the method outlined in this youtube video to move them to the global scope : http://www.youtube.com/watch?v=7-e3vGRq5FI
Small and efficient!
However, popups are set per Site. It'd be way more versatile if you're able to set popups portal wide.
I.e, create a popup which are shown based on the rule "If URL contains /forum" will trigger on:
Most useful and functional portlet submitted yet. It would be nice to see more developers like this.