The new Kim Komando device comparison chart I cited in a post this morning is already obsolete. I learned a few minutes ago that Sony will begin selling a dedicated eReader in October that will let you download OverDrive eBooks directly to it via WiFi. No PC as middleman needed with this eReader. It will be called the Reader Wi-Fi, but I have no pricing information yet.
You can read the full Library Journal.com blog post at http://www.libraryjournal.com/lj/home/891828-264/sony_announces_first_dedicated_ereader.html.csp