I'm looking to use WordPress to build a site that showcases products in a certain niche, similar in format/layout to a CSS gallery, but I haven't been able to figure out if WordPress is able to do something. From what I've seen, most CSS galleries allow you to view by color, category, layout, etc, but only by one attribute at a time. What I would like to do is emulate a feature many e-commerce stores have, which is to filter by category A, then category B, then category C. For example, if I were to search Amazon for a plasma tv, I could drill down by manufacturer, then price, then size, or any combination of the above. So my question is, would it be possible to include a line of drop-down filters somewhere on the site, where a user could select category A from the first drop-down, then category B from the second drop-down, and then perform a search or filter posts by those attributes?