I would be interested in checking out the sample, but I just went to Amazon (I have a Kindle) and it says that the book is not currently available - either for purchase or sampling.
As for marketing, both Librarything.com and goodreads.com have author giveaways to members in exchange for reviews. You might offer up some copies there. I can't speak for everyone at those sites, but when I receive a free review copy, I always post a review on both
http://www.Librarything.com,
http://www.goodreads.com and Amazon.com as well as my book blog.
Unfortunately, I can't tell you how to go about listing review copies, as I have not done it, but both sites are pretty user-friendly.
You might also check out smashwords.com - for independently published ebooks. I just discovered that site, so again, I don't know much about how it works, but here's an FAQ on publishing through them:
http://http://www.smashwords.com/abo..._on_smashwords