At the face to face in Berlin we brought up bringing this into core and exposing it as require('stream').pump. A couple questions:

1. are you ok with this idea?
2. do you want to open the pull or are you ok if I or @mcollina does so?
3. How do you feel about waving copyright on this and end-of-stream? It's OK if you don't want to do so but if you do it will make it significantly less complicated to bring it into node core.