My family did a little shopping in south Nashua this afternoon. The lines were long and money was flowing. In Best Buy, 40 people waited at the registers. The exchanges line was 25 deep. We lucked out because we bought an item in the computer department, which has its own registers. In Barnes and Noble the check out line made a lengthy switchback in two lanes. Traffic on Daniel Webster Highway at about 3 p.m. jammed the roadway.