I am getting married this coming fall and in my searches online (looking for something, finding something else totally unrelated) I was happy to see that Nordstrom's has their own organic shopping nook complete with sections for Women, Juniors, Men, Kids, Beauty, and Home. While a lot of the products look like they are cotton/organic cotton blends, it is great nonetheless to see a dedicated area with some environmentally-friendly alternatives make their way to the mall! Check out this intro to organic fibers by Christine Chamberlin of The Clean Bedroom and her blog by the same name to learn more.
Fabric swatches image from Plover Organic
Lovely 100% organic bedding from Plover Organic can be found at Vivaterra. What a breath of fresh air - it is hard to come across more than the basics in organic bedding.
BONUS If you are looking for spring fabric, a few of these beauties are available by the yard.