I would have already bought a Sony Reader, despite my dislike of their BBeB DRM, except for the fact that they tied their computer interface to computers with Windows as the operating system. Since I am a long time user of Apple's Mac computers, I did not want to jump through all the hoops I would have faced in transferring digital books to the Sony Reader and installing updates to the Sony Reader firmware.
The Bookeen site makes it clear that the Cybook simply uses the USB from any computer for its interface, i.e., not dependent upon the computer's OS.
Both the Sony Reader and Cybook are nice devices. It is simply that Sony made some decisions that effectively ruined the use of their device by anyone with a non-Windows OS.
I will be ordering the Bookeen Cybook Gen 3 through NAEB because I will be able to interface with my iMac.
Robert