If/When bitcoin grows as large as some think/hope it will, there won't be "a bitcoin community" anymore than there is a "USD community". Sure, you'll have communities of various sorts surrounding different aspects of the currency, like you do with any other currency, but for the most part the users of it won't really have any real sense of "community membership". I pay for things with paypal on occasion, but I don't have any sense of a "paypal community".