unfiled → event
undecided → low
new → open
Very nice idea, but I'm not sure the cost/benefit ratio is low enough.
Firstly, judging from webkit's list of prefixed APIs, there are only about 4-6 events that benefit from such a shortcut. The one named here (transitionend), 3 CSS animation events, and possibly speech recognition.
Secondly, we could probably reuse some of the CSS vender prefix code, but I imagine there wouldn't be as much overlap as we'd like (due not only to firefox's lack of a prefix with these events, but also our determination to keep the css module independent so it can be excluded).
I'll leave it open for discussion.