Maybe allow people to re-submit their own reviews to your site? They own the original copyright. In the meantime, you could quote an excerpt and link to the original.
Ya, it seems analogous to TrustYou. In doing further research, it looks like Amazon is granted a right to use the copy as they wish, which could be to let affiliates, resellers, and any other people market the product, IMHO. And isn't driving users to a website to laugh at a review a form of marketing?
