I look forward to it. Next time I need some variation of this, even if it *isn't* the same variation you end up building, the fact that there's a potential de facto standard for what to call the ".inv" or whatever still helps me, right?
Also, even if nobody ever agrees to put this in the stdlib, the collections module linked to some outside recipes/modules like OrderedSet long before Nick and the other packaging guys started pushing the idea that it was a good idea for the stdlib in general. I think if this gets sufficient uptake, it deserves such a link. As you say, it's something many people end up building for themselves.