No, at least not in my case (twice, most recently Jan. 2007) or that of anyone who was close enough ahead of me to notice. You go to a separate window before inbound passport inspection. They take the money, stamp your passport and staple a small slip of paper to the stamp. If you don't have the cash, or presumably if your cash doesn't meet their standard for "no dirty bills," they escort you to an ATM that dispenses dollars. (I don't know what they do if you don't have an ATM card, or yours doesn't work for any reason.) Then you join the regular immigration line.

It's very businesslike and applies to citizens of any country that charges Chileans for visas. Besides the U.S., the list includes Canada and Australia; there may be others. The amount in each case is what that country charges Chileans, and is payable in that country's currency.