This section of our site goes in to some level of detail about brewing a number of different styles of beer. Before attempting to brew different styles, it is highly recommended that you spend time understand what defines a style and some commercial examples. Craftbeer.com has a great interactive section of there site dedicated to explaining the main attributes of many beer styles. We highly recommend that you reference this site often. You can access it by clicking here.
We also recommend referencing the BJCP Beer Style Guidelines.