[From Wikipedia]
Oysters can be eaten half shelled, raw, smoked, boiled, baked, fried, roasted, stewed, canned, pickled, steamed, broiled (grilled) or used in a variety of drinks. Preparation can be as simple as opening the shell, while cooking can be as spare as adding butter and/or salt, or can be very elaborate.
FOOD is HOT!
If you want them pre-made for you, Beckta has as excellent oyster plate as an appie (this may be seasonal however so no idea if it's always on the menu), also, there is "Big Daddies Crab Shack and Oyster Bar" on Bank Street and another location on Fisher (no idea if it's any good though). Cans of smoked oysters should be available at most supermarkets.