You can stand in line at the airport gift shop. Or just sign online for your souvenirs. At GuesswhatIbroughtyou.com, time-pressed travelers can pick out gifts for family and friends, then have the souvenirs delivered to their hotel rooms by 7 a.m. the next day (we’ll never tell). The site currently operates in New York, and is expanding to Boston; Chicago; Washington, D.C.; and Atlanta by June. Service starts in New Orleans, Miami, Houston, and Dallas by September.