<div class="hproduct">
   <h1 class="fn">Product</h1>
   <p class="brand">Brand</p>
   <p class="category">Category</p>
   <p class="price">99.95 Eur</p>
   <p class="description">Description</p>
   <a href="http://example.com" class="url">example.com</a>
</div>

http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=146750

hProduct snippet

PHP