Hacker News Reader

Sorry, it's isn't comprehensive but more of an introduction, e.g. no mention of the difference between pattern and hold space or the n/N commands.

no mention on how to implement tetris in sed either. ( which would be the end of the road in sed-fu )

I think you're getting confused with implementing sed in sed. ;-)

I think I'll have to surrender my lisp noob badge forever after such an omission.