Rob, sign up for their blog site and you'll get links to monthly downloadable fabrics for the library--they tell you how to get it to work on their site. Also, most manufacturers have a link for their new collections, unfortunately you often have to resize the picture of the fabric once it's on your computer (like you would for the Board) and then can link it to your EQ library. Using those 2 methods you'll get tons of fabrics with no cost.
As far as scanning your own fabrics, you can do that too but again it often needs resizing. And with panels (which you don't get with the libraries anyway) scanning just doesn't work! Have fun with EQ--I don't use it all the time, but it's a life saver--kept me from having my Christmas D9 turn into a Nazi Christmas quilt! And invaluable when you have blocks of different sizes and want to put together.