This is a variation of the ObserverPattern from the GangOfFour DesignPatterns book.
Queue notifications to a central "notification service," with priorities. The notifications can go out to other objects later; highest priority first.
http://st-www.cs.uiuc.edu/cgi-bin/wikic/wikic?ExtendedObserver BrokenLink 20100208 (last edited 11 years ago).
Related to MultiCaster, FundamentalConstructionMetaphors
May have been posted by WilliamGrosso
It was in LeastRecentChangesNinetyNine until it got edited.