well one of them, can't remember after what song it is. is "anyone seen the bridge?" which is most commonly used to transition from so much to say into too much, but more recently started going after other parts.
No. Pieces of the segue between Pig and Spoon have been used as songs before being put on the album, though (like Deed Is Done, and ASTB like bassman said).
it's too bad that Deed is Done never got finished. B/C it's honestly one of the most chilling pieces of music on that album in my opinion. It's got a little bit of everything and would have been so sweet. Bring back Lillywhite!