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So you want to rank for the word OR? Or.... Vente d'or sur internet Because thats what your title says.

Webmaster Tools help has a nice articled that outlines the actual HTML examples of how to utilize Hreview: http://www.google.com/support/webmasters/bin/answer.py?answer=146645 The schema.org definition and example page is here http://schema.org/Review I know that Yelp and Tripadvisor do a good job at marking up their listings with Hcard and Hreview.  typically when you type in a specific hotel + city combo in Google, those guys will have a rich snippet with start ratings, and you can see how they mark it up. Another good article written last year by seogadget: http://seogadget.co.uk/using-hreview-microformat-on-your-review-page/ That should be enough to get you started!