Activism:
Animal Defense League of Chicago: Get the info on demonstrations going on! There are ADLs also in Portland, Oregon; Boston, Massachusetts; and Long Island, New York.
GoVegan.net: lots of information about adopting a vegan lifestyle
Mercy for Animals
SHAC 7: activists convicted of violating the Animal Enterprise Terrorism Act, simply for running a webpage and distributing information about Huntington Life Sciences (an animal testing lab)

Socialization:
Weight Watchers Veggie Board
VegHaven

The Animals:
Dakin Shelter: where I got Avocado and Ginny
Itchmo: news for concerned pet owners
Voiceless: The Fund for Animals
Peaceful Prairie Sanctuary: rescued farm animals

Shopping:
Avalon Organics: all-organic, all-vegan health and beauty supplies
Kiss My Face: I love their supplies.
Jason Cosmetics
Vegan Booze Guide
One-stop vegan shopping!
Herbivore Clothing: I love their selection.
Soy Candles by Phebes

Food:
The Post-Punk Kitchen: delicious vegan food
Happy Cow: Guide to veg*n restaurants around the world
Fat Free Vegan: healthy and yummy to boot!
The Chicago Diner: Meat-Free, anything can be made vegan
TJ Scallywaggles's Vegan House of Pizza & Subs: for when you're in Boston

Blogs:
Where's the Revolution