Today only (Tuesday, September 1, 2009) from 2 p.m. to 5:30 p.m., you can get a free burrito from Baja Fresh when you purchase any large beverage. You have to be a fan on Facebook and you'll need to print the coupon available there.
Be sure to read the fine print as it appears this is not available in every location. I'd also recommend calling your store ahead of time to verify that they are honoring this coupon.
Thanks, Saving Cents with Sense!