Portillo's Restaurant in Normal is open for business. After several training days with invited guests, including media day last Thursday, the store is open for the masses. Some diners arrvied as early as 6:30am Tuesday to be one of the first in line. The town of Normal landed Portillo's, a Chicago area favorite, by agreeing to give developer Bloomington Landmark $1.875 million in future sales tax receipts from the restaurant to subsidize demolition and construction. The total could reach $2.5 million with interest.