Fill a large pot with about ½ inch of beer. Add the mussels, steamers, corn, onion, potato and linguica. Cover the pot and steam over medium-high heat, until the potato is soft and tender. Fill a second large pot with ½ inch of water, set a steamer basket in the pot, and bring the water to a boil. Add the lobster and steam for 10-12 minutes.
Serve with melted butter and strained broth from the clambake.