From an email from the Red Sox:
The "April 25th and September 19th games are on-sale now and you can reserve your tickets by emailing Michael Lawlor at mlawlorATredsox.com. Much like last season, these seats will be located in the Coca-Cola Left Field Pavilion section. Seats cost $75 each and we will have an allotment of Standing Room tickets at $25 each as well. The Standing Room area consists of a patio type area with a bar table, picnic tables, and fantastic view of the Boston skyline. All seats will be sold on a first-come, first-serve basis and inquiries will be processed in the order that they are received."
Thank you Red Sox!