Remember when Kroc talked about IE's jump lists and syntax? ( camendesign.com/… ) Kroc explained (with a very accurate point of view in my opinion) that the syntax used was bad and harmful.
Kroc also proposed an alternative syntax (which received mixed reactions, based on what he appended to the article).
But a few days ago (it's already "old", but I just had the patience to post it now), Paul Rouget from Mozilla posted a new add-on for Firefox 4, which implements almost that same syntax (with some neat things). And the system might get implemented on later versions of Firefox.
So, what is your opinion?