For years, Apple has churned out versions of Mac OS X pumped full of new features geared toward the average user. And it seems like with every iteration of Mac OS X, the new feature count balloons. While many of these new features are small -- for example, Apple touted additional fonts as a new Leopard feature -- new features still drove marketing and appeal for new Mac OS X versions. With Snow Leopard, Apple is taking a detour, and is focusing on performance, under-the-hood improvements, and user interface refinements. That doesn't mean Snow Leopard isn't worth paying attention to, though. Here are five things you should know about Snow Leopard.