I'm in a Master's program at U of I and I have to drive down to Champaign once a semester. The highlight is usually Coco Mero, which is an absolutely delicious frozen yogurt place. They have mochi and red bean, which I apply liberally to my yogurt. I also like that they have lactose free varieties that don't upset my stomach. It's a bit pricey (i usually don't get out of there spending less than $6) but it's totally worth a splurge every now and then.
Pineapple frozen yogurt + blackberries + mochi + red bean = wonderful.