This is the Kindle 2 competitor that will fit in your pocket and has a built in PDF support. Weighing at just 5.3-ounces, the Cybook Opus from Bookeen provides a highest resolution of 200dpi with a 6-inch display, and a 1GB of flash memory to store Adobe ePub, PDF, HTML and text documents. You will also have access to a catalog of 150,000 books. [Electronista]
