A brand-new implementation of the Selectors API has landed in the latest Firefox nightlies (and in Firefox 3.1a1) – on track to head your way in the upcoming Firefox 3.1 release. I’ve talked about this API before (1, 2) and while I do have some misgivings about the current API (which will be remedied in upcoming revisions of the spec) there is one thing that is undeniable about it: It is extraordi