I have heard from a credible source that CNET also provides the back-end e-commerce infrastructure for DPReview.com (although I do not see any mention of CNET on their site... perhaps CNET provides the comparison shopping lists). Now that Amazon has acquired the site, I would expect that infrastructure contract to switch from CNET to AMZN in order to drive more digital camera sales at AMZN.
In general, I expect to see more digital content acquisitions by shopping sites looking to drive traffic. TechTarget, an online provider of corporate IT content, is on deck for an IPO this week (read my post here). It has been a rumored target in the past and likely will be in the future.