Welcome to MobileRead (MR), Debra, and what a very nice husband you have.
We have a great Kindle forum on MR and at the very top of that forum are some sticky threads of additional information. You may find all the information in
Links Every Kindle Owner Should Have fun to check out.
MobileRead also has a great free library,
The Patricia Clark Memorial Library, of mostly PD books that have been beautifully formatted and proofed by some very dedicated MR members. Check out the Mobi/PRC section to discover something exciting.
There is even a great monthly sticky thread,
"FREE (and bargain) books for the Kindle" that you can check out. The January 2011 thread is up now.
Enjoy exploring the forums and just ask if you have any questions.