Very cool and innovative. I could definitely see using this as a quick way to build things like "Favorite stories told on hubski" or "Science stories from 2013" or "Comments that made me think" stuff like that. I'm sure you're already thinking of ways to do this, but it would be handy to have a short url version of the list.
Thanks. Yes, a short url definitely came to mind. Your saved posts page should have an associated list url, I think. Really, any feed could have one. In fact, we could redesign saving around this, which is related to an idea that we have been kicking around some time. You might want to be able to archive the lists you've built. There are quite a number of possibilities that have come to mind. That's why I want to put it out there before we commit to anything.