Common Ground offers a lot of options for vegans-frozen food, fresh food, bulk food, local and/or organic produce, etc.
I wouldn't come here to buy Gardein products (or any other frozen vegan foods) unless they are the only place that carries it. I love their mission, and I love that they are trying to pay their employees a living wage (how many retail places can claim that?!-in the age of globalization, Wal-Mart, Target, etc.). I pretty much shop here when my budget allows.
They have a HUGE selection of protein/granola bars, and a good number of them are vegan. I recommend NuGo Organic-they're SO GOOD!
Common Ground also makes vegan pizza-so if you're not in the mood to make your own vegan pizza-you can just go here and pick up a slice (or two).
You can find a lot more vegetarian and vegan options here than you can at most other grocery stores in the Champaign-Urbana area.