The Poetry Foundation
A national non-profit supporting poetry and producing Poetry Magazine.
The Writer’s Almanac
Garrison Keillor brings you a poem of the day, and you can even have it sent to your e-mail.
The Library of Congress’ poetry page
Proof that the government may actually care about the arts (maybe).
Poetry Daily
These people spoon-feed you one great poem a day.
Poetry Aloud
So much of poetry is its sound, this site lets you listen.
The Electronic Poetry Center at SUNY Buffalo
e-poetry was all the rage for a while, including hyperpoetry and this site provides a decent archive.
The Academy of American Poets
Fancy sounding group has a great archive.