Yeah. I think we're not even talking similarity algorithms, just bulk-cloning someone elses reading list, and making my own lists from those. Which is the joy of having separated "watch" from "Trust" - I can just go ahead and subscribe to everyone! So if I find someone new, and their reading list is full of neat stuff, rather than adding everyone on it by hand, I just say "Clone this for me", and it a) automatically subs me to everyone on the list, and b) creates a filter named something useful and intuitive. I mean I know I can just go to whoever.dw.org/read, but as zvi points out, that can change. And I want one /read/custom page where I can merge lists, read multiple lists, etc. Want want want!