“I Can Fix It!” by Damali Ayo
“When allies fail, part one” on What Tami Said
“Guidelines for Being Strong White Allies” by Paul Kivel
“White Privilege: Unpacking the Invisible Knapsack” by Peggy McIntosh
“Whiteness and the 99%” by Joel Olson
“How To Be an Ally If You Are a Person With Privilege” by Frances Kendall
“White Supremacy Culture” by Kenneth Jones and Tema Okun
And of course:
UPDATE: Two good articles for white people about Trayvon Martin.
“Dear White Folks: You Don’t Know How Easy You Have It” by David Leonard
” ‘The Talk’ with My White Daughter” by Sally Kohn
UPDATE: Coming to us from Tumblr, Racism 101: Are You a Racist?
Especially check out Racism 104: Ally, Step by Step and their other “classes.”