Whoohoo! Amazon has finally made Kindle books loanable!
Not all books are loanable. To find out how to tell which ones are and which ones aren't, go here.
Once you know you can loan one, how do you do it? Go here for the details.
Someone you know has loaned you a book on Kindle and you need to know how to get it onto whatever Kindle reader you use? Go here.
Don't have a Kindle, but would like to read Kindle books? Go here for apps for your PC, iPad, smart phone, etc.
There are more answers to frequently asked questions here.
What are you waiting for?
While you're at it, go to the Kindle Facebook page for contests for Amazon Kindle swag.