There are a couple really good biographies on Allen Ginsburg. He really was an extremely interesting character. Same with William Burroughs.
Sorry to bum you man, but Ginsberg was one of a kind. I'm a huge fan of him as well. He's so brutally honest. Like the guy above me said, read some of the biographies. They really give a helpful insight. I can't really think of anyone that's similar.
i too am a big ginsberg fan. but i would be remiss if i didn't add kerouak's "scattered poems" to the list. paisley skye.