Hello Orac -- given that you are fond of SF/F, get yourself right over to
www.baen.com/library and check out the over 100 free SF/F novels available. If you buy the Sony reader, download the LRF or ePub format of the book.
Orbit offers one book each month for $1.00. For July, that's
Hidden Empire by Kevin J. Anderson. See
http://www.onedollarorbit.com/ for information on how to get the discounted book.
Random House has set up
http://www.suvudu.com/freelibrary/ as a place to distribute free SF/F books. The very first ones they offered will be available for free through 19 August, and they keep adding books to the list.
Oh yes, I should also say
WELCOME! to MobileRead.