But they aren't everywhere, yet. Many bars and restaurants are beginning to offer high quality beers on tap and in bottles. The market today is such that you could easily end up with a very disappointing import while missing a truly wonderful domestic. Always, always, always ask to see a beer list. Servers are not always educated in beer lore and may misinterpret what you are looking for in a good beer.
Most liquor stores carry a good selection of bottled beers.
Many major grocery chains are also beginning to carry remarkable selections. The file is publist. There are some other regional guides stored in the archives. Yup, monthly subscriptions just like a magazine. These services send a selection of beers each month until you tell them to stop.