iChic Gear has released a series of new folio-style iPad 2 cases that have almost identical bodies; they're differentiated from one another by their materials. Beijing ($49) is made of leather, and lined with Asian-patterned silk on the inside. The rear shell is plastic and the iPad 2 snaps right in. A long opening along the top provides access to the headphone port, microphone, and Sleep/Wake button, while there are more precise cutouts along…