Websites
Yup, this is the whole translation of Homer's works by George Chapman. See what all the fuss is about.
The Poetry Foundation has put together a biography of Keats that gives you more than you could ever need.
The American Academy of Poets hosts a concise introduction to John Keats, many of his important poems, and a bibliography of his work.
Here's a small site with some helpful commentary, but (most importantly) a copy of Keats's original manuscript of the poem. It includes a different line seven.
Video
This is a trailer for the independent film about John Keats and his true love, Fanny Brawne. Watch it and you'll see just how Romantic Keats was.
This is a very slow mediation on some clouds at sunset, with the poem in the background.
Images
Here's a copy of Keats's original manuscript of the poem. It includes a different line seven.
This is a mask made of Keats' face after his early death.
Audio
The former British Poet Laureate delivers a fine reading of the poem.
Check out this… uh, funky and smooth interpretation.
Articles and Interviews
Keats wrote some of the most famous letters of any English poet—beautiful love letters to Fanny Brawne and insightful commentary on the life of a poet.
Books
This edition of Keats's work was edited by noted critic and poet Edward Hirsch.
Walter Jackson Bate's biography of Keats won the Pulitzer Prize for its incredible insight into his life and work.
Maybe a bit of a snoozer these days, but this is the history book that Keats had been reading when he wrote the poem. You can see the passage he read about Balboa (but then confused with Cortez).