Yah, you have that option, if you're cool with the 8GB bonus. As opposed to the larger Walmart 17GB bonus.
If you're content with that option, you don't even need to go to an AT&T store. You can order a SIM online direct from the AT&T website. Complete with a $25 sign-up credit, and no need to buy a phone. The SIM needs to be shipped to your US address.