One agreement, one disagreement ...
Bukowski, indeed, rules all. I've managed to collect most of his writings (rereleases and compilations, obviously) and find that he's one of the few writers that I can read again, and again, and again, and again, and not get sick of. I have noticed, though, that a lot of the people that I've recommended him to have not necessarily dug him as much. Still, though, if someone hasn't read anything by Bukowski, I'd definitely recommend giving him a shot.
And while I do think that most of the beats are overrated (Kerouac and Ginsberg especially) I am a fan of Burroughs. Junky is an awesome book, better than anything by JK or AG. But, I guess that I'm not a fan of Burroughs' poetry, which is what the original question was, so I might be off-track with this response.
Howl>On The Road>Naked Lunch>lots and lots of other lit.