Do you use specialty cupcake liners/baking cups, or just plain white ones? Or do you offer customers the choice? Is there a good place to purchase them in bulk?

I prefer the white; especially because you can see the flavor of the cupcake through them. I buy them at GFS. They come in packs of 500 for less than $5 (I think). They're inexpensive.

What is GFS?

Gordon Food Service-they are a store that stocks bulk foods, indiustrial size canned good, large size dairy products and bulk paper goods for the general public and businesses, schools, churches, etc.

I'm not sure if they are in you area though.