Busiek did (and does still, occasionally) write Astro City. His overall writing schedule has been pretty hampered the past few years due to a pretty serious illness (I heard mercury poisoning, but I haven't researched to see if it's true. I'm sure he has said somewhere, as he is very good about communicating with the fans). He is an upcoming writer for JLA, which is very cool as his work on Avengers was excellent. He also did the recent JLA/Avengers crossover, which will be (if not already) collected into trade paperback form. This crossover was originally conceived by him and George Perez 20 years ago, and they had actually done some pages of a story at that time. They were finally allowed to do it...
I understood that you wanted this to be about TPBs for CS's (and other's) sake. They're more n00b friendly. I was just saying that I don't have a lot of experience with trades. Hmm. I guess if you like Dark Knight Returns, you could pick up the Daredevil trades that are written by Frank Miller. He's really the writer that made DD relevant, and a lot of the movie (the major plot points, anyway) was taken from his work. Miller also did a bunch of Sin City trades, which is his own really really dark and gritty non-superhero characters.