If someone likes sleeve for his reader, Oberon design now started to offer mini sleeves for Kindle Non-touch (or Kindle 4).
http://www.oberondesign.com/shop/car...duct_list&c=90
It's size 7.375 x 7.25 inches may work with Sony T1 as well. Haven't tried it, but if Amazon Kindle Non-touch sleeve works with T1, why not?