I have a un-natural love for my kindle I take it with me everywhere I go. I frequently check for free books on Amazon but I also frequent Smashwords.com after being told about it on facebook. I have discovered some really good writers and would recommend that you check them out as well.
Not all of the books are free on Smashwords but those that are not are quite reasonable.
Hoping to receive a lot of Amazon gift cards for my birthday!