Websites
Here's a page devoted to the poem that includes a copy of the original manuscript and excerpts of criticism by scholars.
Is Dickinson a "neurotic poet"? We don't like when people explain away genius as some kind of mental eccentricity, but it's an interesting site nonetheless.
Two brief but very useful biographies of the poet.
This site has promise but is a little hard to navigate. But once you look around, you'll great find links to Dickinson's letters, writings by her family members, and articles by professor-types.
Join the Emily Dickinson group on Facebook.
Audio
The New Yorker has a little fun with Ms. Dickinson and sound effects.
Listen to an actress perform Dickinson poems and letters.
Images
New(ly-discovered), old picture of Dickinson. Scroll down to see the image.
Books
For all you Dickinson nerds, this is the latest in Dickinson scholarship, and you can access each issue online. (You will need a library or university account to log in.)
Dickinson's letters are amazing, and some of them are harder to figure out than a Sunday Sudoku puzzle. Check out the letters addressed to some unknown person whom she calls her "Master."