Here's a list of places where you can read poetry from lit journals for free. If you are too poor to buy a subscription, or if you want to shop around before you buy a big name and then realize it has a different aesthetic, here you go. I think there's easily enough content here as zines come out, and as magazines update their samples, to fill ease poetry hunger pains!
But remember...support lit mags you like if you have cash! You don't want them to go all Quarterly West on you :(
Kenyon Review Online
Pebble Lake Review
Diane Lockward's Picks
Samples from Current Issues:
Beloit Poetry Journal also features a poem of the day from the BPJ archives.
Black Warrior Review also has online content.
Field has sample poems from current and past issues.
The Gettysburg Review
The Greensboro Review
The Laurel Review
and more later!