Avenue A | Razorfish, one of the largest interactive agencies in the world has moved its 38-member Boston team to 280 Summer St. Williamsgate Commercial Realty represented Avenue A | Razorfish. Kevin Brown, senior vice president of Lincoln Property Co. represented the landlord. Stan Kubinski, senior designer at s t a | Silverman Trykowski Associates, Inc., was the architect. Previously located at 210 Broadway in Cambridge, the move brings Avenue A | Razorfish from 5,000 s/f to 10,000 s/f, providing space to expand to 70 employees over the next 1-3 years.