Look for Icehouse in early 2010 at the former Southend Brewery at Atherton Mill in South End. John Duncan of Bonterra and Las Ramblas plans a lineup of 200 beers, signature burgers, barbecue, ribs and pizzas. Edens & Avant, the group that owns Atherton Mill, plans design changes in the property "focused on features that will engage and connect people from the neighborhood": think more restaurants, stores and a glossing up of the outdoor space. Dan Boone, a chef who's been with Duncan a long time and was formerly chef at Mac's Speed Shop (both are no longer affiliated with Mac's), will do the Icehouse menu. 2100 South Blvd.