If you aren't burned out on book-buying, that is. I'm just happy to finally see somebody who buys books the way I do -
gimme, gimme, gimme! 1.
Doubt: A History: The Great Doubters and Their Legacy of Innovation from Socrates and Jesus to Thomas Jefferson and Emily Dickinson by Jennifer Michael Hecht
http://www.amazon.com/Doubt-Doubters-Innovation-Jefferson-Dickinson/dp/0060097957/ref=sr_1_1?ie=UTF8&s=books&qid=1278811381&sr=1-1Since you're a recent "de-convert," I can't recommend this book highly enough. It is just fantastic, and the perfect answer to those people who keep yammering about "The New Atheists."
Hecht proves there's nothing new about atheism. It has a history just as varied, rich and long as religious belief (if not longer). Hecht's style is light and very readable.
In the last quarter - 20th century doubters - Hecht sorta runs out of gas. She covers the Unholy Trinity of Dawkins, Harris and Hitches very quickly. But that's a minor nitpick.
2.
2000 Years of Disbelief: Famous People With the Courage to Doubt by James A. Haught
http://www.amazon.com/2000-Years-Disbelief-Famous-Courage/dp/1573920673/ref=sr_1_1?ie=UTF8&s=books&qid=1278811314&sr=1-1#_A collection of quotes, with a thumbnail bio of each subject. Like Hecht's book, it runs from ancient times to modern, covering famous and less-known doubters - Voltaire, Ingersoll, Freud, Bertrand Russell, etc. Some of the quotes and sourcing are controversial, but the book is still worth having. Sort of a shorter and less dense version of the Hitchens book - "The Atheist's Bedside Reader," more or less.
The information about Thomas Edison made me ROFL. His second wife Mina was a devout Xian, and she once invited a bunch of preachers to dinner, thinking their discussions of Learned Theology might convert her husband.
When the assembled clerics started nattering, Edison simply stood up and said: "I'm not listening to any more of this nonsense." And stalked out of the room.
After that, Mr. and Mrs. Edison just agreed to disagree about religion, and lived happily ever after.